diff --git a/.github/ISSUE_TEMPLATE.md b/.github/ISSUE_TEMPLATE.md
index c5eff009c..12e7f02ce 100644
--- a/.github/ISSUE_TEMPLATE.md
+++ b/.github/ISSUE_TEMPLATE.md
@@ -6,12 +6,13 @@
 
 ---
 
-### Make sure you are using the *latest* version: run `youtube-dl --version` and ensure your version is *2018.01.27*. If it's not, read [this FAQ entry](https://github.com/rg3/youtube-dl/blob/master/README.md#how-do-i-update-youtube-dl) and update. Issues with outdated version will be rejected.
-- [ ] I've **verified** and **I assure** that I'm running youtube-dl **2018.01.27**
+### Make sure you are using the *latest* version: run `youtube-dl --version` and ensure your version is *2018.02.03*. If it's not, read [this FAQ entry](https://github.com/rg3/youtube-dl/blob/master/README.md#how-do-i-update-youtube-dl) and update. Issues with outdated version will be rejected.
+- [ ] I've **verified** and **I assure** that I'm running youtube-dl **2018.02.03**
 
 ### Before submitting an *issue* make sure you have:
 - [ ] At least skimmed through the [README](https://github.com/rg3/youtube-dl/blob/master/README.md), **most notably** the [FAQ](https://github.com/rg3/youtube-dl#faq) and [BUGS](https://github.com/rg3/youtube-dl#bugs) sections
 - [ ] [Searched](https://github.com/rg3/youtube-dl/search?type=Issues) the bugtracker for similar issues including closed ones
+- [ ] Checked that provided video/audio/playlist URLs (if any) are alive and playable in a browser
 
 ### What is the purpose of your *issue*?
 - [ ] Bug report (encountered problems with youtube-dl)
@@ -35,7 +36,7 @@ Add the `-v` flag to **your command line** you run youtube-dl with (`youtube-dl
 [debug] User config: []
 [debug] Command-line args: [u'-v', u'http://www.youtube.com/watch?v=BaW_jenozKcj']
 [debug] Encodings: locale cp1251, fs mbcs, out cp866, pref cp1251
-[debug] youtube-dl version 2018.01.27
+[debug] youtube-dl version 2018.02.03
 [debug] Python version 2.7.11 - Windows-2003Server-5.2.3790-SP2
 [debug] exe versions: ffmpeg N-75573-g1d0487f, ffprobe N-75573-g1d0487f, rtmpdump 2.4
 [debug] Proxy map: {}
diff --git a/.github/ISSUE_TEMPLATE_tmpl.md b/.github/ISSUE_TEMPLATE_tmpl.md
index 26f61d3b4..8edbd5a0f 100644
--- a/.github/ISSUE_TEMPLATE_tmpl.md
+++ b/.github/ISSUE_TEMPLATE_tmpl.md
@@ -12,6 +12,7 @@
 ### Before submitting an *issue* make sure you have:
 - [ ] At least skimmed through the [README](https://github.com/rg3/youtube-dl/blob/master/README.md), **most notably** the [FAQ](https://github.com/rg3/youtube-dl#faq) and [BUGS](https://github.com/rg3/youtube-dl#bugs) sections
 - [ ] [Searched](https://github.com/rg3/youtube-dl/search?type=Issues) the bugtracker for similar issues including closed ones
+- [ ] Checked that provided video/audio/playlist URLs (if any) are alive and playable in a browser
 
 ### What is the purpose of your *issue*?
 - [ ] Bug report (encountered problems with youtube-dl)
diff --git a/ChangeLog b/ChangeLog
index 00c5c9c6b..db212c4a1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,22 @@
+version 2018.02.03
+
+Core
++ Introduce --http-chunk-size for chunk-based HTTP downloading
++ Add support for IronPython
+* [downloader/ism] Fix Python 3.2 support
+
+Extractors
+* [redbulltv] Fix extraction (#15481)
+* [redtube] Fix metadata extraction (#15472)
+* [pladform] Respect platform id and extract HLS formats (#15468)
+- [rtlnl] Remove progressive formats (#15459)
+* [6play] Do no modify asset URLs with a token (#15248)
+* [nationalgeographic] Relax URL regular expression
+* [dplay] Relax URL regular expression (#15458)
+* [cbsinteractive] Fix data extraction (#15451)
++ [amcnetworks] Add support for sundancetv.com (#9260)
+
+
 version 2018.01.27
 
 Core
diff --git a/README.md b/README.md
index 7787a3f17..f8fc27823 100644
--- a/README.md
+++ b/README.md
@@ -198,6 +198,11 @@ Alternatively, refer to the [developer instructions](#developer-instructions) fo
                                      size. By default, the buffer size is
                                      automatically resized from an initial value
                                      of SIZE.
+    --http-chunk-size SIZE           Size of a chunk for chunk-based HTTP
+                                     downloading (e.g. 10485760 or 10M) (default
+                                     is disabled). May be useful for bypassing
+                                     bandwidth throttling imposed by a webserver
+                                     (experimental)
     --playlist-reverse               Download playlist videos in reverse order
     --playlist-random                Download playlist videos in random order
     --xattr-set-filesize             Set file xattribute ytdl.filesize with
diff --git a/setup.cfg b/setup.cfg
index 2dc06ffe4..5208f7ae2 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -3,4 +3,4 @@ universal = True
 
 [flake8]
 exclude = youtube_dl/extractor/__init__.py,devscripts/buildserver.py,devscripts/lazy_load_template.py,devscripts/make_issue_template.py,setup.py,build,.git
-ignore = E402,E501,E731
+ignore = E402,E501,E731,E741
diff --git a/test/test_downloader_http.py b/test/test_downloader_http.py
new file mode 100644
index 000000000..5cf2bf1a5
--- /dev/null
+++ b/test/test_downloader_http.py
@@ -0,0 +1,125 @@
+#!/usr/bin/env python
+# coding: utf-8
+from __future__ import unicode_literals
+
+# Allow direct execution
+import os
+import re
+import sys
+import unittest
+sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+
+from test.helper import try_rm
+from youtube_dl import YoutubeDL
+from youtube_dl.compat import compat_http_server
+from youtube_dl.downloader.http import HttpFD
+from youtube_dl.utils import encodeFilename
+import ssl
+import threading
+
+TEST_DIR = os.path.dirname(os.path.abspath(__file__))
+
+
+def http_server_port(httpd):
+    if os.name == 'java' and isinstance(httpd.socket, ssl.SSLSocket):
+        # In Jython SSLSocket is not a subclass of socket.socket
+        sock = httpd.socket.sock
+    else:
+        sock = httpd.socket
+    return sock.getsockname()[1]
+
+
+TEST_SIZE = 10 * 1024
+
+
+class HTTPTestRequestHandler(compat_http_server.BaseHTTPRequestHandler):
+    def log_message(self, format, *args):
+        pass
+
+    def send_content_range(self, total=None):
+        range_header = self.headers.get('Range')
+        start = end = None
+        if range_header:
+            mobj = re.search(r'^bytes=(\d+)-(\d+)', range_header)
+            if mobj:
+                start = int(mobj.group(1))
+                end = int(mobj.group(2))
+        valid_range = start is not None and end is not None
+        if valid_range:
+            content_range = 'bytes %d-%d' % (start, end)
+            if total:
+                content_range += '/%d' % total
+            self.send_header('Content-Range', content_range)
+        return (end - start + 1) if valid_range else total
+
+    def serve(self, range=True, content_length=True):
+        self.send_response(200)
+        self.send_header('Content-Type', 'video/mp4')
+        size = TEST_SIZE
+        if range:
+            size = self.send_content_range(TEST_SIZE)
+        if content_length:
+            self.send_header('Content-Length', size)
+        self.end_headers()
+        self.wfile.write(b'#' * size)
+
+    def do_GET(self):
+        if self.path == '/regular':
+            self.serve()
+        elif self.path == '/no-content-length':
+            self.serve(content_length=False)
+        elif self.path == '/no-range':
+            self.serve(range=False)
+        elif self.path == '/no-range-no-content-length':
+            self.serve(range=False, content_length=False)
+        else:
+            assert False
+
+
+class FakeLogger(object):
+    def debug(self, msg):
+        pass
+
+    def warning(self, msg):
+        pass
+
+    def error(self, msg):
+        pass
+
+
+class TestHttpFD(unittest.TestCase):
+    def setUp(self):
+        self.httpd = compat_http_server.HTTPServer(
+            ('127.0.0.1', 0), HTTPTestRequestHandler)
+        self.port = http_server_port(self.httpd)
+        self.server_thread = threading.Thread(target=self.httpd.serve_forever)
+        self.server_thread.daemon = True
+        self.server_thread.start()
+
+    def download(self, params, ep):
+        params['logger'] = FakeLogger()
+        ydl = YoutubeDL(params)
+        downloader = HttpFD(ydl, params)
+        filename = 'testfile.mp4'
+        try_rm(encodeFilename(filename))
+        self.assertTrue(downloader.real_download(filename, {
+            'url': 'http://127.0.0.1:%d/%s' % (self.port, ep),
+        }))
+        self.assertEqual(os.path.getsize(encodeFilename(filename)), TEST_SIZE)
+        try_rm(encodeFilename(filename))
+
+    def download_all(self, params):
+        for ep in ('regular', 'no-content-length', 'no-range', 'no-range-no-content-length'):
+            self.download(params, ep)
+
+    def test_regular(self):
+        self.download_all({})
+
+    def test_chunked(self):
+        self.download_all({
+            'http_chunk_size': 1000,
+        })
+
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/test/test_http.py b/test/test_http.py
index 7a7a3510f..409fec9c8 100644
--- a/test/test_http.py
+++ b/test/test_http.py
@@ -47,7 +47,7 @@ class HTTPTestRequestHandler(compat_http_server.BaseHTTPRequestHandler):
                 self.end_headers()
                 return
 
-            new_url = 'http://localhost:%d/中文.html' % http_server_port(self.server)
+            new_url = 'http://127.0.0.1:%d/中文.html' % http_server_port(self.server)
             self.send_response(302)
             self.send_header(b'Location', new_url.encode('utf-8'))
             self.end_headers()
@@ -74,7 +74,7 @@ class FakeLogger(object):
 class TestHTTP(unittest.TestCase):
     def setUp(self):
         self.httpd = compat_http_server.HTTPServer(
-            ('localhost', 0), HTTPTestRequestHandler)
+            ('127.0.0.1', 0), HTTPTestRequestHandler)
         self.port = http_server_port(self.httpd)
         self.server_thread = threading.Thread(target=self.httpd.serve_forever)
         self.server_thread.daemon = True
@@ -86,15 +86,15 @@ class TestHTTP(unittest.TestCase):
             return
 
         ydl = YoutubeDL({'logger': FakeLogger()})
-        r = ydl.extract_info('http://localhost:%d/302' % self.port)
-        self.assertEqual(r['entries'][0]['url'], 'http://localhost:%d/vid.mp4' % self.port)
+        r = ydl.extract_info('http://127.0.0.1:%d/302' % self.port)
+        self.assertEqual(r['entries'][0]['url'], 'http://127.0.0.1:%d/vid.mp4' % self.port)
 
 
 class TestHTTPS(unittest.TestCase):
     def setUp(self):
         certfn = os.path.join(TEST_DIR, 'testcert.pem')
         self.httpd = compat_http_server.HTTPServer(
-            ('localhost', 0), HTTPTestRequestHandler)
+            ('127.0.0.1', 0), HTTPTestRequestHandler)
         self.httpd.socket = ssl.wrap_socket(
             self.httpd.socket, certfile=certfn, server_side=True)
         self.port = http_server_port(self.httpd)
@@ -107,11 +107,11 @@ class TestHTTPS(unittest.TestCase):
             ydl = YoutubeDL({'logger': FakeLogger()})
             self.assertRaises(
                 Exception,
-                ydl.extract_info, 'https://localhost:%d/video.html' % self.port)
+                ydl.extract_info, 'https://127.0.0.1:%d/video.html' % self.port)
 
         ydl = YoutubeDL({'logger': FakeLogger(), 'nocheckcertificate': True})
-        r = ydl.extract_info('https://localhost:%d/video.html' % self.port)
-        self.assertEqual(r['entries'][0]['url'], 'https://localhost:%d/vid.mp4' % self.port)
+        r = ydl.extract_info('https://127.0.0.1:%d/video.html' % self.port)
+        self.assertEqual(r['entries'][0]['url'], 'https://127.0.0.1:%d/vid.mp4' % self.port)
 
 
 def _build_proxy_handler(name):
@@ -132,23 +132,23 @@ def _build_proxy_handler(name):
 class TestProxy(unittest.TestCase):
     def setUp(self):
         self.proxy = compat_http_server.HTTPServer(
-            ('localhost', 0), _build_proxy_handler('normal'))
+            ('127.0.0.1', 0), _build_proxy_handler('normal'))
         self.port = http_server_port(self.proxy)
         self.proxy_thread = threading.Thread(target=self.proxy.serve_forever)
         self.proxy_thread.daemon = True
         self.proxy_thread.start()
 
         self.geo_proxy = compat_http_server.HTTPServer(
-            ('localhost', 0), _build_proxy_handler('geo'))
+            ('127.0.0.1', 0), _build_proxy_handler('geo'))
         self.geo_port = http_server_port(self.geo_proxy)
         self.geo_proxy_thread = threading.Thread(target=self.geo_proxy.serve_forever)
         self.geo_proxy_thread.daemon = True
         self.geo_proxy_thread.start()
 
     def test_proxy(self):
-        geo_proxy = 'localhost:{0}'.format(self.geo_port)
+        geo_proxy = '127.0.0.1:{0}'.format(self.geo_port)
         ydl = YoutubeDL({
-            'proxy': 'localhost:{0}'.format(self.port),
+            'proxy': '127.0.0.1:{0}'.format(self.port),
             'geo_verification_proxy': geo_proxy,
         })
         url = 'http://foo.com/bar'
@@ -162,7 +162,7 @@ class TestProxy(unittest.TestCase):
 
     def test_proxy_with_idn(self):
         ydl = YoutubeDL({
-            'proxy': 'localhost:{0}'.format(self.port),
+            'proxy': '127.0.0.1:{0}'.format(self.port),
         })
         url = 'http://中文.tw/'
         response = ydl.urlopen(url).read().decode('utf-8')
diff --git a/youtube_dl/__init__.py b/youtube_dl/__init__.py
index ba684a075..9bb952457 100644
--- a/youtube_dl/__init__.py
+++ b/youtube_dl/__init__.py
@@ -191,6 +191,11 @@ def _real_main(argv=None):
         if numeric_buffersize is None:
             parser.error('invalid buffer size specified')
         opts.buffersize = numeric_buffersize
+    if opts.http_chunk_size is not None:
+        numeric_chunksize = FileDownloader.parse_bytes(opts.http_chunk_size)
+        if not numeric_chunksize:
+            parser.error('invalid http chunk size specified')
+        opts.http_chunk_size = numeric_chunksize
     if opts.playliststart <= 0:
         raise ValueError('Playlist start must be positive')
     if opts.playlistend not in (-1, None) and opts.playlistend < opts.playliststart:
@@ -346,6 +351,7 @@ def _real_main(argv=None):
         'keep_fragments': opts.keep_fragments,
         'buffersize': opts.buffersize,
         'noresizebuffer': opts.noresizebuffer,
+        'http_chunk_size': opts.http_chunk_size,
         'continuedl': opts.continue_dl,
         'noprogress': opts.noprogress,
         'progress_with_newline': opts.progress_with_newline,
diff --git a/youtube_dl/compat.py b/youtube_dl/compat.py
index 27ece2d29..4a611f183 100644
--- a/youtube_dl/compat.py
+++ b/youtube_dl/compat.py
@@ -2909,8 +2909,8 @@ else:
     if platform.python_implementation() == 'IronPython' and sys.version_info < (2, 7, 8):
         class compat_Struct(struct.Struct):
             def unpack(self, string):
-                if not isinstance(string, buffer):
-                    string = buffer(string)
+                if not isinstance(string, buffer):  # noqa: F821
+                    string = buffer(string)  # noqa: F821
                 return super(compat_Struct, self).unpack(string)
     else:
         compat_Struct = struct.Struct
diff --git a/youtube_dl/downloader/http.py b/youtube_dl/downloader/http.py
index 3ff26ff70..dc2b37beb 100644
--- a/youtube_dl/downloader/http.py
+++ b/youtube_dl/downloader/http.py
@@ -7,10 +7,14 @@ import time
 import re
 
 from .common import FileDownloader
-from ..compat import compat_urllib_error
+from ..compat import (
+    compat_str,
+    compat_urllib_error,
+)
 from ..utils import (
     ContentTooShortError,
     encodeFilename,
+    int_or_none,
     sanitize_open,
     sanitized_Request,
     write_xattr,
@@ -42,17 +46,22 @@ class HttpFD(FileDownloader):
         request = sanitized_Request(url, None, headers)
 
         is_test = self.params.get('test', False)
-
-        if is_test:
-            request.add_header('Range', 'bytes=0-%s' % str(self._TEST_FILE_SIZE - 1))
+        chunk_size = self._TEST_FILE_SIZE if is_test else (
+            self.params.get('http_chunk_size') or 0)
 
         ctx.open_mode = 'wb'
         ctx.resume_len = 0
+        ctx.data_len = None
+        ctx.block_size = self.params.get('buffersize', 1024)
+        ctx.start_time = time.time()
 
         if self.params.get('continuedl', True):
             # Establish possible resume length
             if os.path.isfile(encodeFilename(ctx.tmpfilename)):
-                ctx.resume_len = os.path.getsize(encodeFilename(ctx.tmpfilename))
+                ctx.resume_len = os.path.getsize(
+                    encodeFilename(ctx.tmpfilename))
+
+        ctx.is_resume = ctx.resume_len > 0
 
         count = 0
         retries = self.params.get('retries', 0)
@@ -64,11 +73,33 @@ class HttpFD(FileDownloader):
             def __init__(self, source_error):
                 self.source_error = source_error
 
+        class NextFragment(Exception):
+            pass
+
+        def set_range(req, start, end):
+            range_header = 'bytes=%d-' % start
+            if end:
+                range_header += compat_str(end)
+            req.add_header('Range', range_header)
+
         def establish_connection():
-            if ctx.resume_len != 0:
-                self.report_resuming_byte(ctx.resume_len)
-                request.add_header('Range', 'bytes=%d-' % ctx.resume_len)
+            if ctx.resume_len > 0:
+                range_start = ctx.resume_len
+                if ctx.is_resume:
+                    self.report_resuming_byte(ctx.resume_len)
                 ctx.open_mode = 'ab'
+            elif chunk_size > 0:
+                range_start = 0
+            else:
+                range_start = None
+            ctx.is_resume = False
+            range_end = range_start + chunk_size - 1 if chunk_size else None
+            if range_end and ctx.data_len is not None and range_end >= ctx.data_len:
+                range_end = ctx.data_len - 1
+            has_range = range_start is not None
+            ctx.has_range = has_range
+            if has_range:
+                set_range(request, range_start, range_end)
             # Establish connection
             try:
                 ctx.data = self.ydl.urlopen(request)
@@ -77,25 +108,35 @@ class HttpFD(FileDownloader):
                 # that don't support resuming and serve a whole file with no Content-Range
                 # set in response despite of requested Range (see
                 # https://github.com/rg3/youtube-dl/issues/6057#issuecomment-126129799)
-                if ctx.resume_len > 0:
+                if has_range:
                     content_range = ctx.data.headers.get('Content-Range')
                     if content_range:
-                        content_range_m = re.search(r'bytes (\d+)-', content_range)
+                        content_range_m = re.search(r'bytes (\d+)-(\d+)?(?:/(\d+))?', content_range)
                         # Content-Range is present and matches requested Range, resume is possible
-                        if content_range_m and ctx.resume_len == int(content_range_m.group(1)):
-                            return
+                        if content_range_m:
+                            if range_start == int(content_range_m.group(1)):
+                                content_range_end = int_or_none(content_range_m.group(2))
+                                content_len = int_or_none(content_range_m.group(3))
+                                accept_content_len = (
+                                    # Non-chunked download
+                                    not chunk_size or
+                                    # Chunked download and requested piece or
+                                    # its part is promised to be served
+                                    content_range_end == range_end or
+                                    content_len < range_end)
+                                if accept_content_len:
+                                    ctx.data_len = content_len
+                                    return
                     # Content-Range is either not present or invalid. Assuming remote webserver is
                     # trying to send the whole file, resume is not possible, so wiping the local file
                     # and performing entire redownload
                     self.report_unable_to_resume()
                     ctx.resume_len = 0
                     ctx.open_mode = 'wb'
+                ctx.data_len = int_or_none(ctx.data.info().get('Content-length', None))
                 return
             except (compat_urllib_error.HTTPError, ) as err:
-                if (err.code < 500 or err.code >= 600) and err.code != 416:
-                    # Unexpected HTTP error
-                    raise
-                elif err.code == 416:
+                if err.code == 416:
                     # Unable to resume (requested range not satisfiable)
                     try:
                         # Open the connection again without the range header
@@ -130,6 +171,15 @@ class HttpFD(FileDownloader):
                             ctx.resume_len = 0
                             ctx.open_mode = 'wb'
                             return
+                elif err.code == 302:
+                    if not chunk_size:
+                        raise
+                    # HTTP Error 302: The HTTP server returned a redirect error that would lead to an infinite loop.
+                    # may happen during chunk downloading. This is usually fixed
+                    # with a retry.
+                elif err.code < 500 or err.code >= 600:
+                    # Unexpected HTTP error
+                    raise
                 raise RetryDownload(err)
             except socket.error as err:
                 if err.errno != errno.ECONNRESET:
@@ -160,7 +210,7 @@ class HttpFD(FileDownloader):
                     return False
 
             byte_counter = 0 + ctx.resume_len
-            block_size = self.params.get('buffersize', 1024)
+            block_size = ctx.block_size
             start = time.time()
 
             # measure time over whole while-loop, so slow_down() and best_block_size() work together properly
@@ -233,25 +283,30 @@ class HttpFD(FileDownloader):
 
                 # Progress message
                 speed = self.calc_speed(start, now, byte_counter - ctx.resume_len)
-                if data_len is None:
+                if ctx.data_len is None:
                     eta = None
                 else:
-                    eta = self.calc_eta(start, time.time(), data_len - ctx.resume_len, byte_counter - ctx.resume_len)
+                    eta = self.calc_eta(start, time.time(), ctx.data_len - ctx.resume_len, byte_counter - ctx.resume_len)
 
                 self._hook_progress({
                     'status': 'downloading',
                     'downloaded_bytes': byte_counter,
-                    'total_bytes': data_len,
+                    'total_bytes': ctx.data_len,
                     'tmpfilename': ctx.tmpfilename,
                     'filename': ctx.filename,
                     'eta': eta,
                     'speed': speed,
-                    'elapsed': now - start,
+                    'elapsed': now - ctx.start_time,
                 })
 
                 if is_test and byte_counter == data_len:
                     break
 
+            if not is_test and chunk_size and ctx.data_len is not None and byte_counter < ctx.data_len:
+                ctx.resume_len = byte_counter
+                # ctx.block_size = block_size
+                raise NextFragment()
+
             if ctx.stream is None:
                 self.to_stderr('\n')
                 self.report_error('Did not get any data blocks')
@@ -276,7 +331,7 @@ class HttpFD(FileDownloader):
                 'total_bytes': byte_counter,
                 'filename': ctx.filename,
                 'status': 'finished',
-                'elapsed': time.time() - start,
+                'elapsed': time.time() - ctx.start_time,
             })
 
             return True
@@ -290,6 +345,8 @@ class HttpFD(FileDownloader):
                 if count <= retries:
                     self.report_retry(e.source_error, count, retries)
                 continue
+            except NextFragment:
+                continue
             except SucceedDownload:
                 return True
 
diff --git a/youtube_dl/extractor/amcnetworks.py b/youtube_dl/extractor/amcnetworks.py
index dd3b18d72..6fb3d6c53 100644
--- a/youtube_dl/extractor/amcnetworks.py
+++ b/youtube_dl/extractor/amcnetworks.py
@@ -11,7 +11,7 @@ from ..utils import (
 
 
 class AMCNetworksIE(ThePlatformIE):
-    _VALID_URL = r'https?://(?:www\.)?(?:amc|bbcamerica|ifc|wetv)\.com/(?:movies|shows(?:/[^/]+)+)/(?P<id>[^/?#]+)'
+    _VALID_URL = r'https?://(?:www\.)?(?:amc|bbcamerica|ifc|(?:we|sundance)tv)\.com/(?:movies|shows(?:/[^/]+)+)/(?P<id>[^/?#]+)'
     _TESTS = [{
         'url': 'http://www.ifc.com/shows/maron/season-04/episode-01/step-1',
         'md5': '',
@@ -51,6 +51,9 @@ class AMCNetworksIE(ThePlatformIE):
     }, {
         'url': 'http://www.wetv.com/shows/la-hair/videos/season-05/episode-09-episode-9-2/episode-9-sneak-peek-3',
         'only_matching': True,
+    }, {
+        'url': 'https://www.sundancetv.com/shows/riviera/full-episodes/season-1/episode-01-episode-1',
+        'only_matching': True,
     }]
 
     def _real_extract(self, url):
diff --git a/youtube_dl/extractor/cbsinteractive.py b/youtube_dl/extractor/cbsinteractive.py
index 681d63e29..6596e98a6 100644
--- a/youtube_dl/extractor/cbsinteractive.py
+++ b/youtube_dl/extractor/cbsinteractive.py
@@ -75,10 +75,10 @@ class CBSInteractiveIE(CBSIE):
         webpage = self._download_webpage(url, display_id)
 
         data_json = self._html_search_regex(
-            r"data-(?:cnet|zdnet)-video(?:-uvp(?:js)?)?-options='([^']+)'",
+            r"data(?:-(?:cnet|zdnet))?-video(?:-(?:uvp(?:js)?|player))?-options='([^']+)'",
             webpage, 'data json')
         data = self._parse_json(data_json, display_id)
-        vdata = data.get('video') or data['videos'][0]
+        vdata = data.get('video') or (data.get('videos') or data.get('playlist'))[0]
 
         video_id = vdata['mpxRefId']
 
diff --git a/youtube_dl/extractor/dplay.py b/youtube_dl/extractor/dplay.py
index a08dace43..b73446773 100644
--- a/youtube_dl/extractor/dplay.py
+++ b/youtube_dl/extractor/dplay.py
@@ -26,7 +26,7 @@ from ..utils import (
 
 
 class DPlayIE(InfoExtractor):
-    _VALID_URL = r'https?://(?P<domain>www\.(?P<host>dplay\.(?P<country>dk|se|no)))/(?:videoer/)?(?P<id>[^/]+/[^/?#]+)'
+    _VALID_URL = r'https?://(?P<domain>www\.(?P<host>dplay\.(?P<country>dk|se|no)))/(?:video(?:er|s)/)?(?P<id>[^/]+/[^/?#]+)'
 
     _TESTS = [{
         # non geo restricted, via secure api, unsigned download hls URL
@@ -89,9 +89,12 @@ class DPlayIE(InfoExtractor):
             'skip_download': True,
         },
     }, {
-        # geo restricted, bypassable via X-Forwarded-For
+
         'url': 'https://www.dplay.dk/videoer/singleliv/season-5-episode-3',
         'only_matching': True,
+    }, {
+        'url': 'https://www.dplay.se/videos/sofias-anglar/sofias-anglar-1001',
+        'only_matching': True,
     }]
 
     def _real_extract(self, url):
diff --git a/youtube_dl/extractor/nationalgeographic.py b/youtube_dl/extractor/nationalgeographic.py
index 9e8d28f48..246f6795a 100644
--- a/youtube_dl/extractor/nationalgeographic.py
+++ b/youtube_dl/extractor/nationalgeographic.py
@@ -68,7 +68,7 @@ class NationalGeographicVideoIE(InfoExtractor):
 
 class NationalGeographicIE(ThePlatformIE, AdobePassIE):
     IE_NAME = 'natgeo'
-    _VALID_URL = r'https?://channel\.nationalgeographic\.com/(?:wild/)?[^/]+/(?:videos|episodes)/(?P<id>[^/?]+)'
+    _VALID_URL = r'https?://channel\.nationalgeographic\.com/(?:(?:wild/)?[^/]+/)?(?:videos|episodes)/(?P<id>[^/?]+)'
 
     _TESTS = [
         {
@@ -102,6 +102,10 @@ class NationalGeographicIE(ThePlatformIE, AdobePassIE):
         {
             'url': 'http://channel.nationalgeographic.com/the-story-of-god-with-morgan-freeman/episodes/the-power-of-miracles/',
             'only_matching': True,
+        },
+        {
+            'url': 'http://channel.nationalgeographic.com/videos/treasures-rediscovered/',
+            'only_matching': True,
         }
     ]
 
diff --git a/youtube_dl/extractor/pladform.py b/youtube_dl/extractor/pladform.py
index e38c7618e..e86c65396 100644
--- a/youtube_dl/extractor/pladform.py
+++ b/youtube_dl/extractor/pladform.py
@@ -4,7 +4,9 @@ from __future__ import unicode_literals
 import re
 
 from .common import InfoExtractor
+from ..compat import compat_urlparse
 from ..utils import (
+    determine_ext,
     ExtractorError,
     int_or_none,
     xpath_text,
@@ -26,17 +28,15 @@ class PladformIE(InfoExtractor):
                         (?P<id>\d+)
                     '''
     _TESTS = [{
-        # http://muz-tv.ru/kinozal/view/7400/
-        'url': 'http://out.pladform.ru/player?pl=24822&videoid=100183293',
-        'md5': '61f37b575dd27f1bb2e1854777fe31f4',
+        'url': 'https://out.pladform.ru/player?pl=64471&videoid=3777899&vk_puid15=0&vk_puid34=0',
+        'md5': '53362fac3a27352da20fa2803cc5cd6f',
         'info_dict': {
-            'id': '100183293',
+            'id': '3777899',
             'ext': 'mp4',
-            'title': 'Тайны перевала Дятлова • 1 серия 2 часть',
-            'description': 'Документальный сериал-расследование одной из самых жутких тайн ХХ века',
+            'title': 'СТУДИЯ СОЮЗ • Шоу Студия Союз, 24 выпуск (01.02.2018) Нурлан Сабуров и Слава Комиссаренко',
+            'description': 'md5:05140e8bf1b7e2d46e7ba140be57fd95',
             'thumbnail': r're:^https?://.*\.jpg$',
-            'duration': 694,
-            'age_limit': 0,
+            'duration': 3190,
         },
     }, {
         'url': 'http://static.pladform.ru/player.swf?pl=21469&videoid=100183293&vkcid=0',
@@ -56,22 +56,48 @@ class PladformIE(InfoExtractor):
     def _real_extract(self, url):
         video_id = self._match_id(url)
 
+        qs = compat_urlparse.parse_qs(compat_urlparse.urlparse(url).query)
+        pl = qs.get('pl', ['1'])[0]
+
         video = self._download_xml(
-            'http://out.pladform.ru/getVideo?pl=1&videoid=%s' % video_id,
-            video_id)
+            'http://out.pladform.ru/getVideo', video_id, query={
+                'pl': pl,
+                'videoid': video_id,
+            })
+
+        def fail(text):
+            raise ExtractorError(
+                '%s returned error: %s' % (self.IE_NAME, text),
+                expected=True)
 
         if video.tag == 'error':
-            raise ExtractorError(
-                '%s returned error: %s' % (self.IE_NAME, video.text),
-                expected=True)
+            fail(video.text)
 
         quality = qualities(('ld', 'sd', 'hd'))
 
-        formats = [{
-            'url': src.text,
-            'format_id': src.get('quality'),
-            'quality': quality(src.get('quality')),
-        } for src in video.findall('./src')]
+        formats = []
+        for src in video.findall('./src'):
+            if src is None:
+                continue
+            format_url = src.text
+            if not format_url:
+                continue
+            if src.get('type') == 'hls' or determine_ext(format_url) == 'm3u8':
+                formats.extend(self._extract_m3u8_formats(
+                    format_url, video_id, 'mp4', entry_protocol='m3u8_native',
+                    m3u8_id='hls', fatal=False))
+            else:
+                formats.append({
+                    'url': src.text,
+                    'format_id': src.get('quality'),
+                    'quality': quality(src.get('quality')),
+                })
+
+        if not formats:
+            error = xpath_text(video, './cap', 'error', default=None)
+            if error:
+                fail(error)
+
         self._sort_formats(formats)
 
         webpage = self._download_webpage(
diff --git a/youtube_dl/extractor/redbulltv.py b/youtube_dl/extractor/redbulltv.py
index 5d6cc3610..243603676 100644
--- a/youtube_dl/extractor/redbulltv.py
+++ b/youtube_dl/extractor/redbulltv.py
@@ -5,135 +5,93 @@ from .common import InfoExtractor
 from ..compat import compat_HTTPError
 from ..utils import (
     float_or_none,
-    int_or_none,
-    try_get,
-    # unified_timestamp,
     ExtractorError,
 )
 
 
 class RedBullTVIE(InfoExtractor):
-    _VALID_URL = r'https?://(?:www\.)?redbull\.tv/(?:video|film|live)/(?:AP-\w+/segment/)?(?P<id>AP-\w+)'
+    _VALID_URL = r'https?://(?:www\.)?redbull\.tv/video/(?P<id>AP-\w+)'
     _TESTS = [{
         # film
-        'url': 'https://www.redbull.tv/video/AP-1Q756YYX51W11/abc-of-wrc',
+        'url': 'https://www.redbull.tv/video/AP-1Q6XCDTAN1W11',
         'md5': 'fb0445b98aa4394e504b413d98031d1f',
         'info_dict': {
-            'id': 'AP-1Q756YYX51W11',
+            'id': 'AP-1Q6XCDTAN1W11',
             'ext': 'mp4',
-            'title': 'ABC of...WRC',
+            'title': 'ABC of... WRC - ABC of... S1E6',
             'description': 'md5:5c7ed8f4015c8492ecf64b6ab31e7d31',
             'duration': 1582.04,
-            # 'timestamp': 1488405786,
-            # 'upload_date': '20170301',
         },
     }, {
         # episode
-        'url': 'https://www.redbull.tv/video/AP-1PMT5JCWH1W11/grime?playlist=shows:shows-playall:web',
+        'url': 'https://www.redbull.tv/video/AP-1PMHKJFCW1W11',
         'info_dict': {
-            'id': 'AP-1PMT5JCWH1W11',
+            'id': 'AP-1PMHKJFCW1W11',
             'ext': 'mp4',
-            'title': 'Grime - Hashtags S2 E4',
-            'description': 'md5:334b741c8c1ce65be057eab6773c1cf5',
+            'title': 'Grime - Hashtags S2E4',
+            'description': 'md5:b5f522b89b72e1e23216e5018810bb25',
             'duration': 904.6,
-            # 'timestamp': 1487290093,
-            # 'upload_date': '20170217',
-            'series': 'Hashtags',
-            'season_number': 2,
-            'episode_number': 4,
         },
         'params': {
             'skip_download': True,
         },
-    }, {
-        # segment
-        'url': 'https://www.redbull.tv/live/AP-1R5DX49XS1W11/segment/AP-1QSAQJ6V52111/semi-finals',
-        'info_dict': {
-            'id': 'AP-1QSAQJ6V52111',
-            'ext': 'mp4',
-            'title': 'Semi Finals - Vans Park Series Pro Tour',
-            'description': 'md5:306a2783cdafa9e65e39aa62f514fd97',
-            'duration': 11791.991,
-        },
-        'params': {
-            'skip_download': True,
-        },
-    }, {
-        'url': 'https://www.redbull.tv/film/AP-1MSKKF5T92111/in-motion',
-        'only_matching': True,
     }]
 
     def _real_extract(self, url):
         video_id = self._match_id(url)
 
         session = self._download_json(
-            'https://api-v2.redbull.tv/session', video_id,
+            'https://api.redbull.tv/v3/session', video_id,
             note='Downloading access token', query={
-                'build': '4.370.0',
                 'category': 'personal_computer',
-                'os_version': '1.0',
                 'os_family': 'http',
             })
         if session.get('code') == 'error':
             raise ExtractorError('%s said: %s' % (
                 self.IE_NAME, session['message']))
-        auth = '%s %s' % (session.get('token_type', 'Bearer'), session['access_token'])
+        token = session['token']
 
         try:
-            info = self._download_json(
-                'https://api-v2.redbull.tv/content/%s' % video_id,
+            video = self._download_json(
+                'https://api.redbull.tv/v3/products/' + video_id,
                 video_id, note='Downloading video information',
-                headers={'Authorization': auth}
+                headers={'Authorization': token}
             )
         except ExtractorError as e:
             if isinstance(e.cause, compat_HTTPError) and e.cause.code == 404:
                 error_message = self._parse_json(
-                    e.cause.read().decode(), video_id)['message']
+                    e.cause.read().decode(), video_id)['error']
                 raise ExtractorError('%s said: %s' % (
                     self.IE_NAME, error_message), expected=True)
             raise
 
-        video = info['video_product']
-
-        title = info['title'].strip()
+        title = video['title'].strip()
 
         formats = self._extract_m3u8_formats(
-            video['url'], video_id, 'mp4', entry_protocol='m3u8_native',
-            m3u8_id='hls')
+            'https://dms.redbull.tv/v3/%s/%s/playlist.m3u8' % (video_id, token),
+            video_id, 'mp4', entry_protocol='m3u8_native', m3u8_id='hls')
         self._sort_formats(formats)
 
         subtitles = {}
-        for _, captions in (try_get(
-                video, lambda x: x['attachments']['captions'],
-                dict) or {}).items():
-            if not captions or not isinstance(captions, list):
-                continue
-            for caption in captions:
-                caption_url = caption.get('url')
-                if not caption_url:
-                    continue
-                ext = caption.get('format')
-                if ext == 'xml':
-                    ext = 'ttml'
-                subtitles.setdefault(caption.get('lang') or 'en', []).append({
-                    'url': caption_url,
-                    'ext': ext,
-                })
+        for resource in video.get('resources', []):
+            if resource.startswith('closed_caption_'):
+                splitted_resource = resource.split('_')
+                if splitted_resource[2]:
+                    subtitles.setdefault('en', []).append({
+                        'url': 'https://resources.redbull.tv/%s/%s' % (video_id, resource),
+                        'ext': splitted_resource[2],
+                    })
 
-        subheading = info.get('subheading')
+        subheading = video.get('subheading')
         if subheading:
             title += ' - %s' % subheading
 
         return {
             'id': video_id,
             'title': title,
-            'description': info.get('long_description') or info.get(
+            'description': video.get('long_description') or video.get(
                 'short_description'),
             'duration': float_or_none(video.get('duration'), scale=1000),
-            # 'timestamp': unified_timestamp(info.get('published')),
-            'series': info.get('show_title'),
-            'season_number': int_or_none(info.get('season_number')),
-            'episode_number': int_or_none(info.get('episode_number')),
             'formats': formats,
             'subtitles': subtitles,
         }
diff --git a/youtube_dl/extractor/redtube.py b/youtube_dl/extractor/redtube.py
index f70a75256..843e45d36 100644
--- a/youtube_dl/extractor/redtube.py
+++ b/youtube_dl/extractor/redtube.py
@@ -46,9 +46,10 @@ class RedTubeIE(InfoExtractor):
             raise ExtractorError('Video %s has been removed' % video_id, expected=True)
 
         title = self._html_search_regex(
-            (r'<h1 class="videoTitle[^"]*">(?P<title>.+?)</h1>',
-             r'videoTitle\s*:\s*(["\'])(?P<title>)\1'),
-            webpage, 'title', group='title')
+            (r'<h(\d)[^>]+class="(?:video_title_text|videoTitle)[^"]*">(?P<title>(?:(?!\1).)+)</h\1>',
+             r'(?:videoTitle|title)\s*:\s*(["\'])(?P<title>(?:(?!\1).)+)\1',),
+            webpage, 'title', group='title',
+            default=None) or self._og_search_title(webpage)
 
         formats = []
         sources = self._parse_json(
@@ -87,12 +88,13 @@ class RedTubeIE(InfoExtractor):
 
         thumbnail = self._og_search_thumbnail(webpage)
         upload_date = unified_strdate(self._search_regex(
-            r'<span[^>]+class="added-time"[^>]*>ADDED ([^<]+)<',
+            r'<span[^>]+>ADDED ([^<]+)<',
             webpage, 'upload date', fatal=False))
         duration = int_or_none(self._search_regex(
             r'videoDuration\s*:\s*(\d+)', webpage, 'duration', default=None))
         view_count = str_to_int(self._search_regex(
-            r'<span[^>]*>VIEWS</span></td>\s*<td>([\d,.]+)',
+            (r'<div[^>]*>Views</div>\s*<div[^>]*>\s*([\d,.]+)',
+             r'<span[^>]*>VIEWS</span>\s*</td>\s*<td>\s*([\d,.]+)'),
             webpage, 'view count', fatal=False))
 
         # No self-labeling, but they describe themselves as
diff --git a/youtube_dl/extractor/rtlnl.py b/youtube_dl/extractor/rtlnl.py
index bba25a233..be36acc46 100644
--- a/youtube_dl/extractor/rtlnl.py
+++ b/youtube_dl/extractor/rtlnl.py
@@ -93,58 +93,11 @@ class RtlNlIE(InfoExtractor):
 
         meta = info.get('meta', {})
 
-        # m3u8 streams are encrypted and may not be handled properly by older ffmpeg/avconv.
-        # To workaround this previously adaptive -> flash trick was used to obtain
-        # unencrypted m3u8 streams (see https://github.com/rg3/youtube-dl/issues/4118)
-        # and bypass georestrictions as well.
-        # Currently, unencrypted m3u8 playlists are (intentionally?) invalid and therefore
-        # unusable albeit can be fixed by simple string replacement (see
-        # https://github.com/rg3/youtube-dl/pull/6337)
-        # Since recent ffmpeg and avconv handle encrypted streams just fine encrypted
-        # streams are used now.
         videopath = material['videopath']
         m3u8_url = meta.get('videohost', 'http://manifest.us.rtl.nl') + videopath
 
         formats = self._extract_m3u8_formats(
             m3u8_url, uuid, 'mp4', m3u8_id='hls', fatal=False)
-
-        video_urlpart = videopath.split('/adaptive/')[1][:-5]
-        PG_URL_TEMPLATE = 'http://pg.us.rtl.nl/rtlxl/network/%s/progressive/%s.mp4'
-
-        PG_FORMATS = (
-            ('a2t', 512, 288),
-            ('a3t', 704, 400),
-            ('nettv', 1280, 720),
-        )
-
-        def pg_format(format_id, width, height):
-            return {
-                'url': PG_URL_TEMPLATE % (format_id, video_urlpart),
-                'format_id': 'pg-%s' % format_id,
-                'protocol': 'http',
-                'width': width,
-                'height': height,
-            }
-
-        if not formats:
-            formats = [pg_format(*pg_tuple) for pg_tuple in PG_FORMATS]
-        else:
-            pg_formats = []
-            for format_id, width, height in PG_FORMATS:
-                try:
-                    # Find hls format with the same width and height corresponding
-                    # to progressive format and copy metadata from it.
-                    f = next(f for f in formats if f.get('height') == height)
-                    # hls formats may have invalid width
-                    f['width'] = width
-                    f_copy = f.copy()
-                    f_copy.update(pg_format(format_id, width, height))
-                    pg_formats.append(f_copy)
-                except StopIteration:
-                    # Missing hls format does mean that no progressive format with
-                    # such width and height exists either.
-                    pass
-            formats.extend(pg_formats)
         self._sort_formats(formats)
 
         thumbnails = []
diff --git a/youtube_dl/extractor/seznamzpravy.py b/youtube_dl/extractor/seznamzpravy.py
index cf32d1e0c..6d4e3b76d 100644
--- a/youtube_dl/extractor/seznamzpravy.py
+++ b/youtube_dl/extractor/seznamzpravy.py
@@ -159,7 +159,6 @@ class SeznamZpravyArticleIE(InfoExtractor):
         webpage = self._download_webpage(url, article_id)
 
         info = self._search_json_ld(webpage, article_id, default={})
-        print(info)
 
         title = info.get('title') or self._og_search_title(webpage, fatal=False)
         description = info.get('description') or self._og_search_description(webpage)
diff --git a/youtube_dl/extractor/sixplay.py b/youtube_dl/extractor/sixplay.py
index 547be8f95..d435f7157 100644
--- a/youtube_dl/extractor/sixplay.py
+++ b/youtube_dl/extractor/sixplay.py
@@ -4,7 +4,11 @@ from __future__ import unicode_literals
 import re
 
 from .common import InfoExtractor
-from ..compat import compat_str
+from ..compat import (
+    compat_parse_qs,
+    compat_str,
+    compat_urllib_parse_urlparse,
+)
 from ..utils import (
     determine_ext,
     int_or_none,
@@ -57,7 +61,7 @@ class SixPlayIE(InfoExtractor):
             container = asset.get('video_container')
             ext = determine_ext(asset_url)
             if container == 'm3u8' or ext == 'm3u8':
-                if protocol == 'usp':
+                if protocol == 'usp' and not compat_parse_qs(compat_urllib_parse_urlparse(asset_url).query).get('token', [None])[0]:
                     asset_url = re.sub(r'/([^/]+)\.ism/[^/]*\.m3u8', r'/\1.ism/\1.m3u8', asset_url)
                     formats.extend(self._extract_m3u8_formats(
                         asset_url, video_id, 'mp4', 'm3u8_native',
diff --git a/youtube_dl/extractor/soundcloud.py b/youtube_dl/extractor/soundcloud.py
index 97ff422f0..1ca310b90 100644
--- a/youtube_dl/extractor/soundcloud.py
+++ b/youtube_dl/extractor/soundcloud.py
@@ -158,7 +158,6 @@ class SoundcloudIE(InfoExtractor):
     ]
 
     _CLIENT_ID = 'DQskPX1pntALRzMp4HSxya3Mc0AO66Ro'
-    _IPHONE_CLIENT_ID = '376f225bf427445fc4bfb6b99b72e0bf'
 
     @staticmethod
     def _extract_urls(webpage):
diff --git a/youtube_dl/options.py b/youtube_dl/options.py
index 4c0455044..7d1bbc021 100644
--- a/youtube_dl/options.py
+++ b/youtube_dl/options.py
@@ -478,6 +478,11 @@ def parseOpts(overrideArguments=None):
         '--no-resize-buffer',
         action='store_true', dest='noresizebuffer', default=False,
         help='Do not automatically adjust the buffer size. By default, the buffer size is automatically resized from an initial value of SIZE.')
+    downloader.add_option(
+        '--http-chunk-size',
+        dest='http_chunk_size', metavar='SIZE', default=None,
+        help='Size of a chunk for chunk-based HTTP downloading (e.g. 10485760 or 10M) (default is disabled). '
+             'May be useful for bypassing bandwidth throttling imposed by a webserver (experimental)')
     downloader.add_option(
         '--test',
         action='store_true', dest='test', default=False,
diff --git a/youtube_dl/version.py b/youtube_dl/version.py
index 8a2b57ffb..7ae919523 100644
--- a/youtube_dl/version.py
+++ b/youtube_dl/version.py
@@ -1,3 +1,3 @@
 from __future__ import unicode_literals
 
-__version__ = '2018.01.27'
+__version__ = '2018.02.03'