Recursively resolve youtube live channels' name

[baco]

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Youtube-dl is unable to find video in Youtube channle live

When trying to access a live stream via its channel url's alias, youtube-dl is unable to determine the youtube's URL for the main video and crashes. For example the site https://youtube.com/lanacionmas/live is an alias for the channel https://youtube.com/channel/UCba3hpU7EFBSk817y9qZkiA/live

If I run: $ youtube-dl -F https://youtube.com/channel/UCba3hpU7EFBSk817y9qZkiA/live --verbose I obtain the expected result, but if I use its alias name lanacionmas when running youtube-dl $ youtube-dl -F https://youtube.com/lanacionmas/live --verbose I get an exception:

[debug] System config: []
[debug] User config: []
[debug] Command-line args: [u'-F', u'https://youtube.com/lanacionmas/live', u'--verbose']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2016.11.08.1
[debug] Python version 2.7.12+ - Linux-4.7.0-1-amd64-x86_64-with-debian-stretch-sid
[debug] exe versions: avconv 3.1.3-2, avprobe 3.1.3-2, ffmpeg 3.1.3-2, ffprobe 3.1.3-2, rtmpdump 2.4
[debug] Proxy map: {}
[youtube:user] lanacionmas: Downloading channel page
WARNING: Unable to download webpage: HTTP Error 404: Not Found
[youtube:user] lanacionmas: Downloading page #1
ERROR: Unable to download webpage: HTTP Error 404: Not Found (caused by HTTPError()); please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
  File "/tmp/mpv/youtube-dl/youtube_dl/extractor/common.py", line 404, in _request_webpage
    return self._downloader.urlopen(url_or_request)
  File "/tmp/mpv/youtube-dl/youtube_dl/YoutubeDL.py", line 2001, in urlopen
    return self._opener.open(req, timeout=self._socket_timeout)
  File "/usr/lib/python2.7/urllib2.py", line 435, in open
    response = meth(req, response)
  File "/usr/lib/python2.7/urllib2.py", line 548, in http_response
    'http', request, response, code, msg, hdrs)
  File "/usr/lib/python2.7/urllib2.py", line 473, in error
    return self._call_chain(*args)
  File "/usr/lib/python2.7/urllib2.py", line 407, in _call_chain
    result = func(*args)
  File "/usr/lib/python2.7/urllib2.py", line 556, in http_error_default
    raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)

[v1kn]

I am getting similar errors, but the video is no longer live
unrelated issue

[yan12125]

@v1kn That's a different problem. Could you open a new issue?

[v1kn]

@yan12125 Sure, done