diff --git a/.github/ISSUE_TEMPLATE.md b/.github/ISSUE_TEMPLATE.md
index 6bc7d0366..145c3ff83 100644
--- a/.github/ISSUE_TEMPLATE.md
+++ b/.github/ISSUE_TEMPLATE.md
@@ -6,8 +6,8 @@
 
 ---
 
-### Make sure you are using the *latest* version: run `youtube-dl --version` and ensure your version is *2018.01.14*. 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 Issues with outdated version will be rejected.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 **2018.01.14**
+### Make sure you are using the *latest* version: run `youtube-dl --version` and ensure your version is *2018.01.21*. 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 Issues with outdated version will be rejected.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 **2018.01.21**
 
 ### 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
@@ -35,7 +35,7 @@ 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 2018.01.14
+[debug] youtube-dl version 2018.01.21
 [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/ChangeLog b/ChangeLog
index bfafaca6a..65a01fcc7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,31 @@
+version 2018.01.21
+
+Core
+* [extractor/common] Improve jwplayer DASH formats extraction (#9242, #15187)
+* [utils] Improve scientific notation handling in js_to_json (#14789)
+
+Extractors
++ [southparkdk] Add support for southparkstudios.nu
++ [southpark] Add support for collections (#14803)
+* [franceinter] Fix upload date extraction (#14996)
++ [rtvs] Add support for rtvs.sk (#9242, #15187)
+* [restudy] Fix extraction and extend URL regular expression (#15347)
+* [youtube:live] Improve live detection (#15365)
++ [springboardplatform] Add support for springboardplatform.com
+* [prosiebensat1] Add another clip id regular expression (#15290)
+- [ringtv] Remove extractor (#15345)
+
+
+version 2018.01.18
+
+Extractors
+* [soundcloud] Update client id (#15306)
+- [kamcord] Remove extractor (#15322)
++ [spiegel] Add support for nexx videos (#15285)
+* [twitch] Fix authentication and error capture (#14090, #15264)
+* [vk] Detect more errors due to copyright complaints (#15259)
+
+
 version 2018.01.14
 
 Extractors
diff --git a/docs/supportedsites.md b/docs/supportedsites.md
index c04a75b88..b0825c58b 100644
--- a/docs/supportedsites.md
+++ b/docs/supportedsites.md
@@ -383,7 +383,6 @@
  - **JWPlatform**
  - **Kakao**
  - **Kaltura**
- - **Kamcord**
  - **KanalPlay**: Kanal 5/9/11 Play
  - **Kankan**
  - **Karaoketv**
@@ -683,7 +682,6 @@
  - **revision**
  - **revision3:embed**
  - **RICE**
- - **RingTV**
  - **RMCDecouverte**
  - **RockstarGames**
  - **RoosterTeeth**
@@ -704,6 +702,7 @@
  - **rtve.es:live**: RTVE.es live streams
  - **rtve.es:television**
  - **RTVNH**
+ - **RTVS**
  - **Rudo**
  - **RUHD**
  - **RulePorn**
@@ -774,6 +773,7 @@
  - **Sport5**
  - **SportBoxEmbed**
  - **SportDeutschland**
+ - **SpringboardPlatform**
  - **Sprout**
  - **sr:mediathek**: Saarländischer Rundfunk
  - **SRGSSR**
diff --git a/test/test_download.py b/test/test_download.py
index 209f5f6d6..ebe820dfc 100644
--- a/test/test_download.py
+++ b/test/test_download.py
@@ -92,8 +92,8 @@ class TestDownload(unittest.TestCase):
 def generator(test_case, tname):
 
     def test_template(self):
-        ie = youtube_dl.extractor.get_info_extractor(test_case['name'])
-        other_ies = [get_info_extractor(ie_key) for ie_key in test_case.get('add_ie', [])]
+        ie = youtube_dl.extractor.get_info_extractor(test_case['name'])()
+        other_ies = [get_info_extractor(ie_key)() for ie_key in test_case.get('add_ie', [])]
         is_playlist = any(k.startswith('playlist') for k in test_case)
         test_cases = test_case.get(
             'playlist', [] if is_playlist else [test_case])
diff --git a/test/test_utils.py b/test/test_utils.py
index 0857c0fc0..fdf6031f7 100644
--- a/test/test_utils.py
+++ b/test/test_utils.py
@@ -814,6 +814,9 @@ class TestUtil(unittest.TestCase):
         inp = '''{"duration": "00:01:07"}'''
         self.assertEqual(js_to_json(inp), '''{"duration": "00:01:07"}''')
 
+        inp = '''{segments: [{"offset":-3.885780586188048e-16,"duration":39.75000000000001}]}'''
+        self.assertEqual(js_to_json(inp), '''{"segments": [{"offset":-3.885780586188048e-16,"duration":39.75000000000001}]}''')
+
     def test_js_to_json_edgecases(self):
         on = js_to_json("{abc_def:'1\\'\\\\2\\\\\\'3\"4'}")
         self.assertEqual(json.loads(on), {"abc_def": "1'\\2\\'3\"4"})
@@ -885,6 +888,13 @@ class TestUtil(unittest.TestCase):
         on = js_to_json('{/*comment\n*/42/*comment\n*/:/*comment\n*/42/*comment\n*/}')
         self.assertEqual(json.loads(on), {'42': 42})
 
+        on = js_to_json('{42:4.2e1}')
+        self.assertEqual(json.loads(on), {'42': 42.0})
+
+    def test_js_to_json_malformed(self):
+        self.assertEqual(js_to_json('42a1'), '42"a1"')
+        self.assertEqual(js_to_json('42a-1'), '42"a"-1')
+
     def test_extract_attributes(self):
         self.assertEqual(extract_attributes('<e x="y">'), {'x': 'y'})
         self.assertEqual(extract_attributes("<e x='y'>"), {'x': 'y'})
diff --git a/youtube_dl/extractor/common.py b/youtube_dl/extractor/common.py
index b9b8fe1a9..92da0ce3c 100644
--- a/youtube_dl/extractor/common.py
+++ b/youtube_dl/extractor/common.py
@@ -2420,7 +2420,7 @@ class InfoExtractor(object):
                 formats.extend(self._extract_m3u8_formats(
                     source_url, video_id, 'mp4', entry_protocol='m3u8_native',
                     m3u8_id=m3u8_id, fatal=False))
-            elif ext == 'mpd':
+            elif source_type == 'dash' or ext == 'mpd':
                 formats.extend(self._extract_mpd_formats(
                     source_url, video_id, mpd_id=mpd_id, fatal=False))
             elif ext == 'smil':
diff --git a/youtube_dl/extractor/extractors.py b/youtube_dl/extractor/extractors.py
index c82614bf9..57e74ba62 100644
--- a/youtube_dl/extractor/extractors.py
+++ b/youtube_dl/extractor/extractors.py
@@ -490,7 +490,6 @@ from .jwplatform import JWPlatformIE
 from .jpopsukitv import JpopsukiIE
 from .kakao import KakaoIE
 from .kaltura import KalturaIE
-from .kamcord import KamcordIE
 from .kanalplay import KanalPlayIE
 from .kankan import KankanIE
 from .karaoketv import KaraoketvIE
@@ -882,7 +881,6 @@ from .revision3 import (
     Revision3IE,
 )
 from .rice import RICEIE
-from .ringtv import RingTVIE
 from .rmcdecouverte import RMCDecouverteIE
 from .ro220 import Ro220IE
 from .rockstargames import RockstarGamesIE
@@ -902,6 +900,7 @@ from .rtp import RTPIE
 from .rts import RTSIE
 from .rtve import RTVEALaCartaIE, RTVELiveIE, RTVEInfantilIE, RTVELiveIE, RTVETelevisionIE
 from .rtvnh import RTVNHIE
+from .rtvs import RTVSIE
 from .rudo import RudoIE
 from .ruhd import RUHDIE
 from .ruleporn import RulePornIE
@@ -991,6 +990,7 @@ from .stitcher import StitcherIE
 from .sport5 import Sport5IE
 from .sportbox import SportBoxEmbedIE
 from .sportdeutschland import SportDeutschlandIE
+from .springboardplatform import SpringboardPlatformIE
 from .sprout import SproutIE
 from .srgssr import (
     SRGSSRIE,
@@ -1046,7 +1046,6 @@ from .theplatform import (
     ThePlatformFeedIE,
 )
 from .thescene import TheSceneIE
-from .thesixtyone import TheSixtyOneIE
 from .thestar import TheStarIE
 from .thesun import TheSunIE
 from .theweatherchannel import TheWeatherChannelIE
diff --git a/youtube_dl/extractor/franceinter.py b/youtube_dl/extractor/franceinter.py
index 707b9e00d..05806895c 100644
--- a/youtube_dl/extractor/franceinter.py
+++ b/youtube_dl/extractor/franceinter.py
@@ -33,7 +33,7 @@ class FranceInterIE(InfoExtractor):
         description = self._og_search_description(webpage)
 
         upload_date_str = self._search_regex(
-            r'class=["\']cover-emission-period["\'][^>]*>[^<]+\s+(\d{1,2}\s+[^\s]+\s+\d{4})<',
+            r'class=["\']\s*cover-emission-period\s*["\'][^>]*>[^<]+\s+(\d{1,2}\s+[^\s]+\s+\d{4})<',
             webpage, 'upload date', fatal=False)
         if upload_date_str:
             upload_date_list = upload_date_str.split()
diff --git a/youtube_dl/extractor/generic.py b/youtube_dl/extractor/generic.py
index 9b0cd004f..1d9da8115 100644
--- a/youtube_dl/extractor/generic.py
+++ b/youtube_dl/extractor/generic.py
@@ -101,6 +101,7 @@ from .vzaar import VzaarIE
 from .channel9 import Channel9IE
 from .vshare import VShareIE
 from .mediasite import MediasiteIE
+from .springboardplatform import SpringboardPlatformIE
 
 
 class GenericIE(InfoExtractor):
@@ -1938,6 +1939,21 @@ class GenericIE(InfoExtractor):
                 'timestamp': 1474354800,
                 'upload_date': '20160920',
             }
+        },
+        {
+            'url': 'http://www.kidzworld.com/article/30935-trolls-the-beat-goes-on-interview-skylar-astin-and-amanda-leighton',
+            'info_dict': {
+                'id': '1731611',
+                'ext': 'mp4',
+                'title': 'Official Trailer | TROLLS: THE BEAT GOES ON!',
+                'description': 'md5:eb5f23826a027ba95277d105f248b825',
+                'timestamp': 1516100691,
+                'upload_date': '20180116',
+            },
+            'params': {
+                'skip_download': True,
+            },
+            'add_ie': [SpringboardPlatformIE.ie_key()],
         }
         # {
         #     # TODO: find another test
@@ -2906,6 +2922,12 @@ class GenericIE(InfoExtractor):
                 for mediasite_url in mediasite_urls]
             return self.playlist_result(entries, video_id, video_title)
 
+        springboardplatform_urls = SpringboardPlatformIE._extract_urls(webpage)
+        if springboardplatform_urls:
+            return self.playlist_from_matches(
+                springboardplatform_urls, video_id, video_title,
+                ie=SpringboardPlatformIE.ie_key())
+
         def merge_dicts(dict1, dict2):
             merged = {}
             for k, v in dict1.items():
diff --git a/youtube_dl/extractor/kamcord.py b/youtube_dl/extractor/kamcord.py
deleted file mode 100644
index b50120d98..000000000
--- a/youtube_dl/extractor/kamcord.py
+++ /dev/null
@@ -1,71 +0,0 @@
-from __future__ import unicode_literals
-
-from .common import InfoExtractor
-from ..compat import compat_str
-from ..utils import (
-    int_or_none,
-    qualities,
-)
-
-
-class KamcordIE(InfoExtractor):
-    _VALID_URL = r'https?://(?:www\.)?kamcord\.com/v/(?P<id>[^/?#&]+)'
-    _TEST = {
-        'url': 'https://www.kamcord.com/v/hNYRduDgWb4',
-        'md5': 'c3180e8a9cfac2e86e1b88cb8751b54c',
-        'info_dict': {
-            'id': 'hNYRduDgWb4',
-            'ext': 'mp4',
-            'title': 'Drinking Madness',
-            'uploader': 'jacksfilms',
-            'uploader_id': '3044562',
-            'view_count': int,
-            'like_count': int,
-            'comment_count': int,
-        },
-    }
-
-    def _real_extract(self, url):
-        video_id = self._match_id(url)
-
-        webpage = self._download_webpage(url, video_id)
-
-        video = self._parse_json(
-            self._search_regex(
-                r'window\.__props\s*=\s*({.+?});?(?:\n|\s*</script)',
-                webpage, 'video'),
-            video_id)['video']
-
-        title = video['title']
-
-        formats = self._extract_m3u8_formats(
-            video['play']['hls'], video_id, 'mp4', entry_protocol='m3u8_native')
-        self._sort_formats(formats)
-
-        uploader = video.get('user', {}).get('username')
-        uploader_id = video.get('user', {}).get('id')
-
-        view_count = int_or_none(video.get('viewCount'))
-        like_count = int_or_none(video.get('heartCount'))
-        comment_count = int_or_none(video.get('messageCount'))
-
-        preference_key = qualities(('small', 'medium', 'large'))
-
-        thumbnails = [{
-            'url': thumbnail_url,
-            'id': thumbnail_id,
-            'preference': preference_key(thumbnail_id),
-        } for thumbnail_id, thumbnail_url in (video.get('thumbnail') or {}).items()
-            if isinstance(thumbnail_id, compat_str) and isinstance(thumbnail_url, compat_str)]
-
-        return {
-            'id': video_id,
-            'title': title,
-            'uploader': uploader,
-            'uploader_id': uploader_id,
-            'view_count': view_count,
-            'like_count': like_count,
-            'comment_count': comment_count,
-            'thumbnails': thumbnails,
-            'formats': formats,
-        }
diff --git a/youtube_dl/extractor/prosiebensat1.py b/youtube_dl/extractor/prosiebensat1.py
index d8a4bd244..7e680a728 100644
--- a/youtube_dl/extractor/prosiebensat1.py
+++ b/youtube_dl/extractor/prosiebensat1.py
@@ -344,6 +344,7 @@ class ProSiebenSat1IE(ProSiebenSat1BaseIE):
         r'clip[iI]d=(\d+)',
         r'clip[iI]d\s*=\s*["\'](\d+)',
         r"'itemImageUrl'\s*:\s*'/dynamic/thumbnails/full/\d+/(\d+)",
+        r'proMamsId&quot;\s*:\s*&quot;(\d+)',
     ]
     _TITLE_REGEXES = [
         r'<h2 class="subtitle" itemprop="name">\s*(.+?)</h2>',
diff --git a/youtube_dl/extractor/restudy.py b/youtube_dl/extractor/restudy.py
index fd50065d4..d47fb45ca 100644
--- a/youtube_dl/extractor/restudy.py
+++ b/youtube_dl/extractor/restudy.py
@@ -5,8 +5,8 @@ from .common import InfoExtractor
 
 
 class RestudyIE(InfoExtractor):
-    _VALID_URL = r'https?://(?:www\.)?restudy\.dk/video/play/id/(?P<id>[0-9]+)'
-    _TEST = {
+    _VALID_URL = r'https?://(?:(?:www|portal)\.)?restudy\.dk/video/[^/]+/id/(?P<id>[0-9]+)'
+    _TESTS = [{
         'url': 'https://www.restudy.dk/video/play/id/1637',
         'info_dict': {
             'id': '1637',
@@ -18,7 +18,10 @@ class RestudyIE(InfoExtractor):
             # rtmp download
             'skip_download': True,
         }
-    }
+    }, {
+        'url': 'https://portal.restudy.dk/video/leiden-frosteffekt/id/1637',
+        'only_matching': True,
+    }]
 
     def _real_extract(self, url):
         video_id = self._match_id(url)
@@ -29,7 +32,7 @@ class RestudyIE(InfoExtractor):
         description = self._og_search_description(webpage).strip()
 
         formats = self._extract_smil_formats(
-            'https://www.restudy.dk/awsmedia/SmilDirectory/video_%s.xml' % video_id,
+            'https://cdn.portal.restudy.dk/dynamic/themes/front/awsmedia/SmilDirectory/video_%s.xml' % video_id,
             video_id)
         self._sort_formats(formats)
 
diff --git a/youtube_dl/extractor/ringtv.py b/youtube_dl/extractor/ringtv.py
deleted file mode 100644
index 2c2c707bd..000000000
--- a/youtube_dl/extractor/ringtv.py
+++ /dev/null
@@ -1,44 +0,0 @@
-from __future__ import unicode_literals
-
-import re
-
-from .common import InfoExtractor
-
-
-class RingTVIE(InfoExtractor):
-    _VALID_URL = r'https?://(?:www\.)?ringtv\.craveonline\.com/(?P<type>news|videos/video)/(?P<id>[^/?#]+)'
-    _TEST = {
-        'url': 'http://ringtv.craveonline.com/news/310833-luis-collazo-says-victor-ortiz-better-not-quit-on-jan-30',
-        'md5': 'd25945f5df41cdca2d2587165ac28720',
-        'info_dict': {
-            'id': '857645',
-            'ext': 'mp4',
-            'title': 'Video: Luis Collazo says Victor Ortiz "better not quit on Jan. 30" - Ring TV',
-            'description': 'Luis Collazo is excited about his Jan. 30 showdown with fellow former welterweight titleholder Victor Ortiz at Barclays Center in his hometown of Brooklyn. The SuperBowl week fight headlines a Golden Boy Live! card on Fox Sports 1.',
-        }
-    }
-
-    def _real_extract(self, url):
-        mobj = re.match(self._VALID_URL, url)
-        video_id = mobj.group('id').split('-')[0]
-        webpage = self._download_webpage(url, video_id)
-
-        if mobj.group('type') == 'news':
-            video_id = self._search_regex(
-                r'''(?x)<iframe[^>]+src="http://cms\.springboardplatform\.com/
-                        embed_iframe/[0-9]+/video/([0-9]+)/''',
-                webpage, 'real video ID')
-        title = self._og_search_title(webpage)
-        description = self._html_search_regex(
-            r'addthis:description="([^"]+)"',
-            webpage, 'description', fatal=False)
-        final_url = 'http://ringtv.craveonline.springboardplatform.com/storage/ringtv.craveonline.com/conversion/%s.mp4' % video_id
-        thumbnail_url = 'http://ringtv.craveonline.springboardplatform.com/storage/ringtv.craveonline.com/snapshots/%s.jpg' % video_id
-
-        return {
-            'id': video_id,
-            'url': final_url,
-            'title': title,
-            'thumbnail': thumbnail_url,
-            'description': description,
-        }
diff --git a/youtube_dl/extractor/rtvs.py b/youtube_dl/extractor/rtvs.py
new file mode 100644
index 000000000..6573b260d
--- /dev/null
+++ b/youtube_dl/extractor/rtvs.py
@@ -0,0 +1,47 @@
+# coding: utf-8
+from __future__ import unicode_literals
+
+from .common import InfoExtractor
+
+
+class RTVSIE(InfoExtractor):
+    _VALID_URL = r'https?://(?:www\.)?rtvs\.sk/(?:radio|televizia)/archiv/\d+/(?P<id>\d+)'
+    _TESTS = [{
+        # radio archive
+        'url': 'http://www.rtvs.sk/radio/archiv/11224/414872',
+        'md5': '134d5d6debdeddf8a5d761cbc9edacb8',
+        'info_dict': {
+            'id': '414872',
+            'ext': 'mp3',
+            'title': 'Ostrov pokladov 1 časť.mp3'
+        },
+        'params': {
+            'skip_download': True,
+        }
+    }, {
+        # tv archive
+        'url': 'http://www.rtvs.sk/televizia/archiv/8249/63118',
+        'md5': '85e2c55cf988403b70cac24f5c086dc6',
+        'info_dict': {
+            'id': '63118',
+            'ext': 'mp4',
+            'title': 'Amaro Džives - Náš deň',
+            'description': 'Galavečer pri príležitosti Medzinárodného dňa Rómov.'
+        },
+        'params': {
+            'skip_download': True,
+        }
+    }]
+
+    def _real_extract(self, url):
+        video_id = self._match_id(url)
+
+        webpage = self._download_webpage(url, video_id)
+
+        playlist_url = self._search_regex(
+            r'playlist["\']?\s*:\s*(["\'])(?P<url>(?:(?!\1).)+)\1', webpage,
+            'playlist url', group='url')
+
+        data = self._download_json(
+            playlist_url, video_id, 'Downloading playlist')[0]
+        return self._parse_jwplayer_data(data, video_id=video_id)
diff --git a/youtube_dl/extractor/soundcloud.py b/youtube_dl/extractor/soundcloud.py
index 6c9816eef..97ff422f0 100644
--- a/youtube_dl/extractor/soundcloud.py
+++ b/youtube_dl/extractor/soundcloud.py
@@ -157,7 +157,7 @@ class SoundcloudIE(InfoExtractor):
         },
     ]
 
-    _CLIENT_ID = 'c6CU49JDMapyrQo06UxU9xouB9ZVzqCn'
+    _CLIENT_ID = 'DQskPX1pntALRzMp4HSxya3Mc0AO66Ro'
     _IPHONE_CLIENT_ID = '376f225bf427445fc4bfb6b99b72e0bf'
 
     @staticmethod
diff --git a/youtube_dl/extractor/southpark.py b/youtube_dl/extractor/southpark.py
index d8ce416fc..da75a43a7 100644
--- a/youtube_dl/extractor/southpark.py
+++ b/youtube_dl/extractor/southpark.py
@@ -6,7 +6,7 @@ from .mtv import MTVServicesInfoExtractor
 
 class SouthParkIE(MTVServicesInfoExtractor):
     IE_NAME = 'southpark.cc.com'
-    _VALID_URL = r'https?://(?:www\.)?(?P<url>southpark\.cc\.com/(?:clips|(?:full-)?episodes)/(?P<id>.+?)(\?|#|$))'
+    _VALID_URL = r'https?://(?:www\.)?(?P<url>southpark\.cc\.com/(?:clips|(?:full-)?episodes|collections)/(?P<id>.+?)(\?|#|$))'
 
     _FEED_URL = 'http://www.southparkstudios.com/feeds/video-player/mrss'
 
@@ -20,6 +20,9 @@ class SouthParkIE(MTVServicesInfoExtractor):
             'timestamp': 1112760000,
             'upload_date': '20050406',
         },
+    }, {
+        'url': 'http://southpark.cc.com/collections/7758/fan-favorites/1',
+        'only_matching': True,
     }]
 
 
@@ -41,7 +44,7 @@ class SouthParkEsIE(SouthParkIE):
 
 class SouthParkDeIE(SouthParkIE):
     IE_NAME = 'southpark.de'
-    _VALID_URL = r'https?://(?:www\.)?(?P<url>southpark\.de/(?:clips|alle-episoden)/(?P<id>.+?)(\?|#|$))'
+    _VALID_URL = r'https?://(?:www\.)?(?P<url>southpark\.de/(?:clips|alle-episoden|collections)/(?P<id>.+?)(\?|#|$))'
     _FEED_URL = 'http://www.southpark.de/feeds/video-player/mrss/'
 
     _TESTS = [{
@@ -70,12 +73,15 @@ class SouthParkDeIE(SouthParkIE):
             'description': 'Kyle will mit seinem kleinen Bruder Ike Videospiele spielen. Als der nicht mehr mit ihm spielen will, hat Kyle Angst, dass er die Kids von heute nicht mehr versteht.',
         },
         'playlist_count': 3,
+    }, {
+        'url': 'http://www.southpark.de/collections/2476/superhero-showdown/1',
+        'only_matching': True,
     }]
 
 
 class SouthParkNlIE(SouthParkIE):
     IE_NAME = 'southpark.nl'
-    _VALID_URL = r'https?://(?:www\.)?(?P<url>southpark\.nl/(?:clips|(?:full-)?episodes)/(?P<id>.+?)(\?|#|$))'
+    _VALID_URL = r'https?://(?:www\.)?(?P<url>southpark\.nl/(?:clips|(?:full-)?episodes|collections)/(?P<id>.+?)(\?|#|$))'
     _FEED_URL = 'http://www.southpark.nl/feeds/video-player/mrss/'
 
     _TESTS = [{
@@ -90,7 +96,7 @@ class SouthParkNlIE(SouthParkIE):
 
 class SouthParkDkIE(SouthParkIE):
     IE_NAME = 'southparkstudios.dk'
-    _VALID_URL = r'https?://(?:www\.)?(?P<url>southparkstudios\.dk/(?:clips|full-episodes)/(?P<id>.+?)(\?|#|$))'
+    _VALID_URL = r'https?://(?:www\.)?(?P<url>southparkstudios\.(?:dk|nu)/(?:clips|full-episodes|collections)/(?P<id>.+?)(\?|#|$))'
     _FEED_URL = 'http://www.southparkstudios.dk/feeds/video-player/mrss/'
 
     _TESTS = [{
@@ -100,4 +106,10 @@ class SouthParkDkIE(SouthParkIE):
             'description': 'Butters is convinced he\'s living in a virtual reality.',
         },
         'playlist_mincount': 3,
+    }, {
+        'url': 'http://www.southparkstudios.dk/collections/2476/superhero-showdown/1',
+        'only_matching': True,
+    }, {
+        'url': 'http://www.southparkstudios.nu/collections/2476/superhero-showdown/1',
+        'only_matching': True,
     }]
diff --git a/youtube_dl/extractor/spiegel.py b/youtube_dl/extractor/spiegel.py
index 84298fee4..fc995e8c1 100644
--- a/youtube_dl/extractor/spiegel.py
+++ b/youtube_dl/extractor/spiegel.py
@@ -4,7 +4,10 @@ from __future__ import unicode_literals
 import re
 
 from .common import InfoExtractor
-from .nexx import NexxEmbedIE
+from .nexx import (
+    NexxIE,
+    NexxEmbedIE,
+)
 from .spiegeltv import SpiegeltvIE
 from ..compat import compat_urlparse
 from ..utils import (
@@ -51,6 +54,10 @@ class SpiegelIE(InfoExtractor):
     }, {
         'url': 'http://www.spiegel.de/video/astronaut-alexander-gerst-von-der-iss-station-beantwortet-fragen-video-1519126-iframe.html',
         'only_matching': True,
+    }, {
+        # nexx video
+        'url': 'http://www.spiegel.de/video/spiegel-tv-magazin-ueber-guellekrise-in-schleswig-holstein-video-99012776.html',
+        'only_matching': True,
     }]
 
     def _real_extract(self, url):
@@ -61,6 +68,14 @@ class SpiegelIE(InfoExtractor):
         if SpiegeltvIE.suitable(handle.geturl()):
             return self.url_result(handle.geturl(), 'Spiegeltv')
 
+        nexx_id = self._search_regex(
+            r'nexxOmniaId\s*:\s*(\d+)', webpage, 'nexx id', default=None)
+        if nexx_id:
+            domain_id = NexxIE._extract_domain_id(webpage) or '748'
+            return self.url_result(
+                'nexx:%s:%s' % (domain_id, nexx_id), ie=NexxIE.ie_key(),
+                video_id=nexx_id)
+
         video_data = extract_attributes(self._search_regex(r'(<div[^>]+id="spVideoElements"[^>]+>)', webpage, 'video element', default=''))
 
         title = video_data.get('data-video-title') or get_element_by_attribute('class', 'module-title', webpage)
diff --git a/youtube_dl/extractor/springboardplatform.py b/youtube_dl/extractor/springboardplatform.py
new file mode 100644
index 000000000..07d99b579
--- /dev/null
+++ b/youtube_dl/extractor/springboardplatform.py
@@ -0,0 +1,125 @@
+# coding: utf-8
+from __future__ import unicode_literals
+
+import re
+
+from .common import InfoExtractor
+from ..utils import (
+    ExtractorError,
+    int_or_none,
+    xpath_attr,
+    xpath_text,
+    xpath_element,
+    unescapeHTML,
+    unified_timestamp,
+)
+
+
+class SpringboardPlatformIE(InfoExtractor):
+    _VALID_URL = r'''(?x)
+                    https?://
+                        cms\.springboardplatform\.com/
+                        (?:
+                            (?:previews|embed_iframe)/(?P<index>\d+)/video/(?P<id>\d+)|
+                            xml_feeds_advanced/index/(?P<index_2>\d+)/rss3/(?P<id_2>\d+)
+                        )
+                    '''
+    _TESTS = [{
+        'url': 'http://cms.springboardplatform.com/previews/159/video/981017/0/0/1',
+        'md5': '5c3cb7b5c55740d482561099e920f192',
+        'info_dict': {
+            'id': '981017',
+            'ext': 'mp4',
+            'title': 'Redman "BUD like YOU" "Usher Good Kisser" REMIX',
+            'description': 'Redman "BUD like YOU" "Usher Good Kisser" REMIX',
+            'thumbnail': r're:^https?://.*\.jpg$',
+            'timestamp': 1409132328,
+            'upload_date': '20140827',
+            'duration': 193,
+        },
+    }, {
+        'url': 'http://cms.springboardplatform.com/embed_iframe/159/video/981017/rab007/rapbasement.com/1/1',
+        'only_matching': True,
+    }, {
+        'url': 'http://cms.springboardplatform.com/embed_iframe/20/video/1731611/ki055/kidzworld.com/10',
+        'only_matching': True,
+    }, {
+        'url': 'http://cms.springboardplatform.com/xml_feeds_advanced/index/159/rss3/981017/0/0/1/',
+        'only_matching': True,
+    }]
+
+    @staticmethod
+    def _extract_urls(webpage):
+        return [
+            mobj.group('url')
+            for mobj in re.finditer(
+                r'<iframe\b[^>]+\bsrc=(["\'])(?P<url>(?:https?:)?//cms\.springboardplatform\.com/embed_iframe/\d+/video/\d+.*?)\1',
+                webpage)]
+
+    def _real_extract(self, url):
+        mobj = re.match(self._VALID_URL, url)
+        video_id = mobj.group('id') or mobj.group('id_2')
+        index = mobj.group('index') or mobj.group('index_2')
+
+        video = self._download_xml(
+            'http://cms.springboardplatform.com/xml_feeds_advanced/index/%s/rss3/%s'
+            % (index, video_id), video_id)
+
+        item = xpath_element(video, './/item', 'item', fatal=True)
+
+        content = xpath_element(
+            item, './{http://search.yahoo.com/mrss/}content', 'content',
+            fatal=True)
+        title = unescapeHTML(xpath_text(item, './title', 'title', fatal=True))
+
+        video_url = content.attrib['url']
+
+        if 'error_video.mp4' in video_url:
+            raise ExtractorError(
+                'Video %s no longer exists' % video_id, expected=True)
+
+        duration = int_or_none(content.get('duration'))
+        tbr = int_or_none(content.get('bitrate'))
+        filesize = int_or_none(content.get('fileSize'))
+        width = int_or_none(content.get('width'))
+        height = int_or_none(content.get('height'))
+
+        description = unescapeHTML(xpath_text(
+            item, './description', 'description'))
+        thumbnail = xpath_attr(
+            item, './{http://search.yahoo.com/mrss/}thumbnail', 'url',
+            'thumbnail')
+
+        timestamp = unified_timestamp(xpath_text(
+            item, './{http://cms.springboardplatform.com/namespaces.html}created',
+            'timestamp'))
+
+        formats = [{
+            'url': video_url,
+            'format_id': 'http',
+            'tbr': tbr,
+            'filesize': filesize,
+            'width': width,
+            'height': height,
+        }]
+
+        m3u8_format = formats[0].copy()
+        m3u8_format.update({
+            'url': re.sub(r'(https?://)cdn\.', r'\1hls.', video_url) + '.m3u8',
+            'ext': 'mp4',
+            'format_id': 'hls',
+            'protocol': 'm3u8_native',
+        })
+        formats.append(m3u8_format)
+
+        self._sort_formats(formats)
+
+        return {
+            'id': video_id,
+            'title': title,
+            'description': description,
+            'thumbnail': thumbnail,
+            'timestamp': timestamp,
+            'duration': duration,
+            'formats': formats,
+        }
diff --git a/youtube_dl/extractor/thesixtyone.py b/youtube_dl/extractor/thesixtyone.py
deleted file mode 100644
index d63aef5de..000000000
--- a/youtube_dl/extractor/thesixtyone.py
+++ /dev/null
@@ -1,106 +0,0 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
-from .common import InfoExtractor
-from ..utils import unified_strdate
-
-
-class TheSixtyOneIE(InfoExtractor):
-    _VALID_URL = r'''(?x)https?://(?:www\.)?thesixtyone\.com/
-        (?:.*?/)*
-        (?:
-            s|
-            song/comments/list|
-            song
-        )/(?:[^/]+/)?(?P<id>[A-Za-z0-9]+)/?$'''
-    _SONG_URL_TEMPLATE = 'http://thesixtyone.com/s/{0:}'
-    _SONG_FILE_URL_TEMPLATE = 'http://{audio_server:}/thesixtyone_production/audio/{0:}_stream'
-    _THUMBNAIL_URL_TEMPLATE = '{photo_base_url:}_desktop'
-    _TESTS = [
-        {
-            'url': 'http://www.thesixtyone.com/s/SrE3zD7s1jt/',
-            'md5': '821cc43b0530d3222e3e2b70bb4622ea',
-            'info_dict': {
-                'id': 'SrE3zD7s1jt',
-                'ext': 'mp3',
-                'title': 'CASIO - Unicorn War Mixtape',
-                'thumbnail': 're:^https?://.*_desktop$',
-                'upload_date': '20071217',
-                'duration': 3208,
-            }
-        },
-        {
-            'url': 'http://www.thesixtyone.com/song/comments/list/SrE3zD7s1jt',
-            'only_matching': True,
-        },
-        {
-            'url': 'http://www.thesixtyone.com/s/ULoiyjuJWli#/s/SrE3zD7s1jt/',
-            'only_matching': True,
-        },
-        {
-            'url': 'http://www.thesixtyone.com/#/s/SrE3zD7s1jt/',
-            'only_matching': True,
-        },
-        {
-            'url': 'http://www.thesixtyone.com/song/SrE3zD7s1jt/',
-            'only_matching': True,
-        },
-        {
-            'url': 'http://www.thesixtyone.com/maryatmidnight/song/StrawberriesandCream/yvWtLp0c4GQ/',
-            'only_matching': True,
-        },
-    ]
-
-    _DECODE_MAP = {
-        'x': 'a',
-        'm': 'b',
-        'w': 'c',
-        'q': 'd',
-        'n': 'e',
-        'p': 'f',
-        'a': '0',
-        'h': '1',
-        'e': '2',
-        'u': '3',
-        's': '4',
-        'i': '5',
-        'o': '6',
-        'y': '7',
-        'r': '8',
-        'c': '9'
-    }
-
-    def _real_extract(self, url):
-        song_id = self._match_id(url)
-
-        webpage = self._download_webpage(
-            self._SONG_URL_TEMPLATE.format(song_id), song_id)
-
-        song_data = self._parse_json(self._search_regex(
-            r'"%s":\s(\{.*?\})' % song_id, webpage, 'song_data'), song_id)
-
-        if self._search_regex(r'(t61\.s3_audio_load\s*=\s*1\.0;)', webpage, 's3_audio_load marker', default=None):
-            song_data['audio_server'] = 's3.amazonaws.com'
-        else:
-            song_data['audio_server'] = song_data['audio_server'] + '.thesixtyone.com'
-
-        keys = [self._DECODE_MAP.get(s, s) for s in song_data['key']]
-        url = self._SONG_FILE_URL_TEMPLATE.format(
-            "".join(reversed(keys)), **song_data)
-
-        formats = [{
-            'format_id': 'sd',
-            'url': url,
-            'ext': 'mp3',
-        }]
-
-        return {
-            'id': song_id,
-            'title': '{artist:} - {name:}'.format(**song_data),
-            'formats': formats,
-            'comment_count': song_data.get('comments_count'),
-            'duration': song_data.get('play_time'),
-            'like_count': song_data.get('score'),
-            'thumbnail': self._THUMBNAIL_URL_TEMPLATE.format(**song_data),
-            'upload_date': unified_strdate(song_data.get('publish_date')),
-        }
diff --git a/youtube_dl/extractor/twitch.py b/youtube_dl/extractor/twitch.py
index f9164af09..1981b4d4a 100644
--- a/youtube_dl/extractor/twitch.py
+++ b/youtube_dl/extractor/twitch.py
@@ -85,10 +85,15 @@ class TwitchBaseIE(InfoExtractor):
                 if isinstance(e.cause, compat_HTTPError) and e.cause.code == 400:
                     response = self._parse_json(
                         e.cause.read().decode('utf-8'), None)
-                    fail(response['message'])
+                    fail(response.get('message') or response['errors'][0])
                 raise
 
-            redirect_url = urljoin(post_url, response['redirect'])
+            if 'Authenticated successfully' in response.get('message', ''):
+                return None, None
+
+            redirect_url = urljoin(
+                post_url,
+                response.get('redirect') or response['redirect_path'])
             return self._download_webpage_handle(
                 redirect_url, None, 'Downloading login redirect page',
                 headers=headers)
@@ -106,6 +111,10 @@ class TwitchBaseIE(InfoExtractor):
                 'password': password,
             })
 
+        # Successful login
+        if not redirect_page:
+            return
+
         if re.search(r'(?i)<form[^>]+id="two-factor-submit"', redirect_page) is not None:
             # TODO: Add mechanism to request an SMS or phone call
             tfa_token = self._get_tfa_info('two-factor authentication token')
diff --git a/youtube_dl/extractor/vk.py b/youtube_dl/extractor/vk.py
index d4838b3e5..b8ea50362 100644
--- a/youtube_dl/extractor/vk.py
+++ b/youtube_dl/extractor/vk.py
@@ -318,9 +318,14 @@ class VKIE(VKBaseIE):
                 'You are trying to log in from an unusual location. You should confirm ownership at vk.com to log in with this IP.',
                 expected=True)
 
+        ERROR_COPYRIGHT = 'Video %s has been removed from public access due to rightholder complaint.'
+
         ERRORS = {
             r'>Видеозапись .*? была изъята из публичного доступа в связи с обращением правообладателя.<':
-            'Video %s has been removed from public access due to rightholder complaint.',
+            ERROR_COPYRIGHT,
+
+            r'>The video .*? was removed from public access by request of the copyright holder.<':
+            ERROR_COPYRIGHT,
 
             r'<!>Please log in or <':
             'Video %s is only available for registered users, '
diff --git a/youtube_dl/extractor/youtube.py b/youtube_dl/extractor/youtube.py
index a01ec1436..f698a5627 100644
--- a/youtube_dl/extractor/youtube.py
+++ b/youtube_dl/extractor/youtube.py
@@ -2530,10 +2530,11 @@ class YoutubeLiveIE(YoutubeBaseInfoExtractor):
         webpage = self._download_webpage(url, channel_id, fatal=False)
         if webpage:
             page_type = self._og_search_property(
-                'type', webpage, 'page type', default=None)
+                'type', webpage, 'page type', default='')
             video_id = self._html_search_meta(
                 'videoId', webpage, 'video id', default=None)
-            if page_type == 'video' and video_id and re.match(r'^[0-9A-Za-z_-]{11}$', video_id):
+            if page_type.startswith('video') and video_id and re.match(
+                    r'^[0-9A-Za-z_-]{11}$', video_id):
                 return self.url_result(video_id, YoutubeIE.ie_key())
         return self.url_result(base_url)
 
diff --git a/youtube_dl/utils.py b/youtube_dl/utils.py
index 386897a85..2fe9cf585 100644
--- a/youtube_dl/utils.py
+++ b/youtube_dl/utils.py
@@ -2267,7 +2267,7 @@ def js_to_json(code):
         "(?:[^"\\]*(?:\\\\|\\['"nurtbfx/\n]))*[^"\\]*"|
         '(?:[^'\\]*(?:\\\\|\\['"nurtbfx/\n]))*[^'\\]*'|
         {comment}|,(?={skip}[\]}}])|
-        [a-zA-Z_][.a-zA-Z_0-9]*|
+        (?:(?<![0-9])[eE]|[a-df-zA-DF-Z_])[.a-zA-Z_0-9]*|
         \b(?:0[xX][0-9a-fA-F]+|0+[0-7]+)(?:{skip}:)?|
         [0-9]+(?={skip}:)
         '''.format(comment=COMMENT_RE, skip=SKIP_RE), fix_kv, code)
diff --git a/youtube_dl/version.py b/youtube_dl/version.py
index 498149110..11e82f433 100644
--- a/youtube_dl/version.py
+++ b/youtube_dl/version.py
@@ -1,3 +1,3 @@
 from __future__ import unicode_literals
 
-__version__ = '2018.01.14'
+__version__ = '2018.01.21'