[BBC Archive] Unable to extract playlist data

[Sophira]

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If the purpose of this issue is a bug report, site support request or you are not completely sure provide the full verbose output as follows:

Add -v flag to your command line you run youtube-dl with, copy the whole output and insert it here. It should look similar to one below (replace it with your log inserted between triple ```):

[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'-v', u'http://www.bbc.co.uk/archive/tomorrowsworld/8005.shtml']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2017.04.28
[debug] Python version 2.7.12 - Linux-4.9.16-gentoo-mynouveau-x86_64-Intel-R-_Core-TM-_i7-5820K_CPU_@_3.30GHz-with-gentoo-2.3
[debug] exe versions: ffmpeg 3.2.4, ffprobe 3.2.4, rtmpdump 2.4
[debug] Proxy map: {}
[bbc] 8005.shtml: Downloading webpage
ERROR: Unable to extract playlist data; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
Traceback (most recent call last):
  File "/usr/lib64/python2.7/site-packages/youtube_dl/YoutubeDL.py", line 760, in extract_info
    ie_result = ie.extract(url)
  File "/usr/lib64/python2.7/site-packages/youtube_dl/extractor/common.py", line 429, in extract
    ie_result = self._real_extract(url)
  File "/usr/lib64/python2.7/site-packages/youtube_dl/extractor/bbc.py", line 985, in _real_extract
    webpage, 'playlist data'),
  File "/usr/lib64/python2.7/site-packages/youtube_dl/extractor/common.py", line 778, in _search_regex
    raise RegexNotFoundError('Unable to extract %s' % _name)
RegexNotFoundError: Unable to extract playlist data; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.

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Description of your issue, suggested solution and other information

I wanted to try to download a video from the BBC archive at http://www.bbc.co.uk/archive/tomorrowsworld/8005.shtml ; unfortunately, I received a "Unable to extract playlist data" error. I'm not sure if the URL is unsupported or not.

I'm running Gentoo Linux, fully up-to-date as of a few days ago.

If the issue is that BBC Archive URLs are unsupported, I would probably be interested in adding support for them myself (unless the current maintainer wishes to do so themselves). However, I haven't done any work on youtube-dl before so might need to ask questions about the codebase!

Thank you. :)