diff --git a/youtube_dl/downloader/common.py b/youtube_dl/downloader/common.py
index 5979833c0..5c3d242c5 100644
--- a/youtube_dl/downloader/common.py
+++ b/youtube_dl/downloader/common.py
@@ -55,7 +55,7 @@ class FileDownloader(object):
     Subclasses of this one must re-define the real_download method.
     """
 
-    _TEST_FILE_SIZE = 10241
+    _TEST_FILE_SIZE = 10240
     params = None
 
     def __init__(self, ydl, params):
diff --git a/youtube_dl/downloader/hls.py b/youtube_dl/downloader/hls.py
index 4def8e2d5..2da16bab7 100644
--- a/youtube_dl/downloader/hls.py
+++ b/youtube_dl/downloader/hls.py
@@ -12,6 +12,7 @@ from .fragment import FragmentFD
 from .external import FFmpegFD
 
 from ..compat import (
+    compat_b64decode,
     compat_urllib_error,
     compat_urlparse,
     compat_struct_pack,
@@ -167,8 +168,11 @@ class HlsFD(FragmentFD):
                             'giving up after %s fragment retries' % fragment_retries)
                         return False
                     if decrypt_info['METHOD'] == 'AES-128':
+                        info_key = info_dict.get('hls_aes128_key')
+                        if info_key:
+                            info_key = compat_b64decode(info_key)
                         iv = decrypt_info.get('IV') or compat_struct_pack('>8xq', media_sequence)
-                        decrypt_info['KEY'] = decrypt_info.get('KEY') or self.ydl.urlopen(
+                        decrypt_info['KEY'] = decrypt_info.get('KEY') or info_key or self.ydl.urlopen(
                             self._prepare_url(info_dict, decrypt_info['URI'])).read()
                         frag_content = AES.new(
                             decrypt_info['KEY'], AES.MODE_CBC, iv).decrypt(frag_content)
diff --git a/youtube_dl/extractor/extractors.py b/youtube_dl/extractor/extractors.py
index 574a47e6d..72689e676 100644
--- a/youtube_dl/extractor/extractors.py
+++ b/youtube_dl/extractor/extractors.py
@@ -1266,6 +1266,7 @@ from .ustudio import (
 )
 from .varzesh3 import Varzesh3IE
 from .vbox7 import Vbox7IE
+from .vdocipher import VdoCipherIE
 from .veehd import VeeHDIE
 from .veoh import VeohIE
 from .vessel import VesselIE
diff --git a/youtube_dl/extractor/vdocipher.py b/youtube_dl/extractor/vdocipher.py
new file mode 100644
index 000000000..b3e5d9cf9
--- /dev/null
+++ b/youtube_dl/extractor/vdocipher.py
@@ -0,0 +1,74 @@
+from __future__ import unicode_literals
+
+import base64
+import json
+import random
+import re
+
+from .common import InfoExtractor
+from ..compat import compat_parse_qs, compat_b64decode
+from ..utils import urljoin, ExtractorError
+
+
+class VdoCipherIE(InfoExtractor):
+    _VALID_URL = r'https?://(?:cdn-[a-z0-9]+\.vdocipher\.com|[a-z0-9]+\.cloudfront\.net)/playerAssets/[0-9\.]+/vdo/embed/index\.html#(?P<querystring>[a-zA-Z0-9&=]+)'
+    _TESTS = [{
+        'url': 'https://d1z78r8i505acl.cloudfront.net/playerAssets/1.4.7/vdo/embed/index.html#otp=20160313versASE313AYhObv4IOA32eG6QbevHoAuOXxFnLOHsVG12HQdM8dDyVp&playbackInfo=eyJ2aWRlb0lkIjoiNmYxYjY3YmUxNTQ4NDc2M2E4YzM4YTUxZDBkNmQ1OGQifQ==',
+        'info_dict': {
+            'otp': '20160313versASE313AYhObv4IOA32eG6QbevHoAuOXxFnLOHsVG12HQdM8dDyVp',
+            'id': '6f1b67be15484763a8c38a51d0d6d58d',
+            'ext': 'mp4',
+            'title': "Upload embed demo new.mp4",
+            'description': None,
+            'duration': 173,
+        },
+    }]
+
+    def _real_extract(self, url):
+        mobj = re.match(self._VALID_URL, url)
+        qs = compat_parse_qs(mobj.group('querystring'))
+        otp = qs['otp'][0]
+        json_data = compat_b64decode(qs['playbackInfo'][0])
+        video_id = json.loads(json_data)['videoId']
+        rand = '%d' % (random.random() * 100000)
+        data = self._download_json(
+            'https://dev.vdocipher.com/api/meta/%s' % video_id, video_id,
+            note="Downloading meta manifest")
+        hostname = data['hostnames'][0]
+        data = self._download_webpage('https://%s/a/' % hostname,
+                                      video_id,
+                                      note="Downloading metadata",
+                                      query={'o': otp, 'p': 'hls', 'ran': rand})
+        meta = json.loads(compat_b64decode(data))
+        m3u8_url = meta['url']
+        m3u8_content = self._download_webpage(
+            m3u8_url, video_id, note="Downloading m3u8 for the key")
+
+        # YTD does not load the cookies for the url of the key, it reuses the cookies obtained for the m3u8.
+        # In our cases these cookies are different from the ones used by the key, so we can't rely on hls.py mechanism.
+        # Download it ourselves and pass it around in hls_aes128_key.
+        keystore_path = urljoin(m3u8_url, self._search_regex(
+            r'#EXT-X-KEY:METHOD=AES-128,URI="(?P<ks>.+?)"', m3u8_content,
+            "keystore path"))
+        key_data = self._request_webpage(keystore_path, video_id,
+                                         note="Downloading AES-128 key").read()
+
+        formats = self._extract_m3u8_formats(m3u8_url, video_id, ext='mp4',
+                                             entry_protocol='m3u8_native',
+                                             m3u8_id='hls', fatal=True)
+        if not formats:
+            raise ExtractorError("No format found for %s" % video_id)
+
+        description = meta.get('description')
+        if description == '-':
+            description = None
+
+        return {
+            'formats': formats,
+            'otp': otp,
+            'hls_aes128_key': base64.b64encode(key_data).decode(),
+            'id': video_id,
+            'duration': int(meta.get('duration', '0')) or None,
+            'title': meta.get('title'),
+            'description': description,
+        }