Playlist support on a supported site, NatGeo

[keybounce]

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• [ x] I've verified and I assure that I'm running youtube-dl 2017.03.24

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• [x ] At least skimmed through README and most notably FAQ and BUGS sections
• [x ] Searched the bugtracker for similar issues including closed ones

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• Bug report (encountered problems with youtube-dl)
• Site support request (request for adding support for a new site)
• [x ] Feature request (request for a new functionality)
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I can download videos from NatGeo, but attempting to download a playlist fails.

Url: http://channel.nationalgeographic.com/startalk/video-gallery/?sort=recent&filter=episodes

keybounceMBP:StarTalk michael$ youtube-dl -v 'http://channel.nationalgeographic.com/startalk/video-gallery/?sort=recent&fil
ter=episodes'
[debug] System config: []
[debug] User config: [u'-o', u'%(title)s.%(ext)s', u'-f', u'\nbest[ext=mp4][height>431][height<=576]/\nbestvideo[ext=mp4][height=480]+bestaudio[ext=m4a]/\nbest[ext=mp4][height>340][height<=431]/\nbestvideo[ext=mp4][height>360][height<=576]+bestaudio/\nbest[height>340][height<=576]/\nbestvideo[height>360][height<=576]+bestaudio/\nbestvideo[height=360]+bestaudio/\nbest[ext=mp4][height>=280][height<=360]/\nbest[height<=576]/\nworst', u'--ap-mso', u'Dish', u'--ap-username', u'PRIVATE', u'--ap-password', u'PRIVATE', u'--write-sub', u'--write-auto-sub', u'--sub-lang', u'en,enUS,en-us', u'--sub-format', u'ass/srt/best', u'--convert-subs', u'ass', u'--embed-subs', u'--recode-video', u'mp4', u'--mark-watched']
[debug] Custom config: []
[debug] Command-line args: [u'-v', u'http://channel.nationalgeographic.com/startalk/video-gallery/?sort=recent&filter=episodes']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2017.03.24
[debug] Python version 2.7.5 - Darwin-13.4.0-x86_64-i386-64bit
[debug] exe versions: ffmpeg 3.2.2, ffprobe 3.2.2, rtmpdump 2.4
[debug] Proxy map: {}
[generic] ?sort=recent&filter=episodes: Requesting header
WARNING: Falling back on generic information extractor.
[generic] ?sort=recent&filter=episodes: Downloading webpage
[generic] ?sort=recent&filter=episodes: Extracting information
ERROR: Unsupported URL: http://channel.nationalgeographic.com/startalk/video-gallery/?sort=recent&filter=episodes
Traceback (most recent call last):
  File "/Users/michael/bin/youtube-dl/youtube_dl/extractor/generic.py", line 1790, in _real_extract
    doc = compat_etree_fromstring(webpage.encode('utf-8'))
  File "/Users/michael/bin/youtube-dl/youtube_dl/compat.py", line 2526, in compat_etree_fromstring
    doc = _XML(text, parser=etree.XMLParser(target=_TreeBuilder(element_factory=_element_factory)))
  File "/Users/michael/bin/youtube-dl/youtube_dl/compat.py", line 2515, in _XML
    parser.feed(text)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/xml/etree/ElementTree.py", line 1642, in feed
    self._raiseerror(v)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/xml/etree/ElementTree.py", line 1506, in _raiseerror
    raise err
ParseError: not well-formed (invalid token): line 7, column 448
Traceback (most recent call last):
  File "/Users/michael/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 761, in extract_info
    ie_result = ie.extract(url)
  File "/Users/michael/bin/youtube-dl/youtube_dl/extractor/common.py", line 428, in extract
    ie_result = self._real_extract(url)
  File "/Users/michael/bin/youtube-dl/youtube_dl/extractor/generic.py", line 2656, in _real_extract
    raise UnsupportedError(url)
UnsupportedError: Unsupported URL: http://channel.nationalgeographic.com/startalk/video-gallery/?sort=recent&filter=episodes

keybounceMBP:StarTalk michael$ 

[keybounce]

Also fails on playlist pages like http://channel.nationalgeographic.com/genius/video-gallery/

(Note no "?sort" options).

keybounceMBP:NatGeo michael$ ./yt-dl -v --get-filename http://channel.nationalgeographic.com/genius/video-gall
ery/
[debug] System config: []
[debug] User config: ['-k', '-o', '%(title)s.%(ext)s', '-f', '\nbest[ext=mp4][height>431][height<=576]/\nbestvideo[ext=mp4][height=480]+bestaudio[ext=m4a]/\nbest[ext=mp4][height>340][height<=431]/\nbestvideo[ext=mp4][height>360][height<=576]+bestaudio/\nbest[height>340][height<=576]/\nbestvideo[height>360][height<=576]+bestaudio/\nbestvideo[height=360]+bestaudio/\nbest[ext=mp4][height>=280][height<=360]/\nbest[height<=576]/\nworst', '--ap-mso', 'Dish', '--ap-username', 'PRIVATE', '--ap-password', 'PRIVATE', '--write-sub', '--write-auto-sub', '--sub-lang', 'en,enUS,en-us', '--sub-format', 'ass/srt/best', '--convert-subs', 'ass', '--embed-subs', '--mark-watched', '--download-archive', 'downloaded-videos.txt']
[debug] Custom config: []
[debug] Command-line args: ['-o', '%(title)s-%(id)6s.%(ext)s', '-v', '--get-filename', 'http://channel.nationalgeographic.com/genius/video-gallery/']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2017.07.02
[debug] Python version 3.6.1 - Darwin-13.4.0-x86_64-i386-64bit
[debug] exe versions: ffmpeg 3.2.4, ffprobe 3.2.4, rtmpdump 2.4
[debug] Proxy map: {}
WARNING: Falling back on generic information extractor.
ERROR: Unsupported URL: http://channel.nationalgeographic.com/genius/video-gallery/
Traceback (most recent call last):
  File "/Users/michael/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 762, in extract_info
    ie_result = ie.extract(url)
  File "/Users/michael/bin/youtube-dl/youtube_dl/extractor/common.py", line 433, in extract
    ie_result = self._real_extract(url)
  File "/Users/michael/bin/youtube-dl/youtube_dl/extractor/generic.py", line 2824, in _real_extract
    raise UnsupportedError(url)
youtube_dl.utils.UnsupportedError: Unsupported URL: http://channel.nationalgeographic.com/genius/video-gallery/

keybounceMBP:NatGeo michael$ 

[keybounce]

Still not working ...

[joemcmahon]

Confirmed this is still failing with 2018.08.04, in both cases.