add wikia video

[treaki]

please add wikia videos like this:

http://video.wikia.com/wiki/File:Star_Trek_Original_Series_Doesn%27t_Make_Sense

test:

$ youtube-dl -v "http://video.wikia.com/wiki/File:Star_Trek_Original_Series_Doesn%27t_Make_Sense"
[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['-v', 'http://video.wikia.com/wiki/File:Star_Trek_Original_Series_Doesn%27t_Make_Sense']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2014.07.11.3
[debug] Python version 2.6.6 - Linux-2.6.32-5-686-bigmem-i686-with-debian-6.0.9
[debug] Proxy map: {}
[generic] File:Star_Trek_Original_Series_Doesn%27t_Make_Sense: Requesting header
WARNING: Falling back on generic information extractor.
[generic] File:Star_Trek_Original_Series_Doesn%27t_Make_Sense: Downloading webpage
[generic] File:Star_Trek_Original_Series_Doesn%27t_Make_Sense: Extracting information
ERROR: Unsupported URL: http://video.wikia.com/wiki/File:Star_Trek_Original_Series_Doesn%27t_Make_Sense; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type  youtube-dl -U  to update.
Traceback (most recent call last):
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/generic.py", line 456, in _real_extract
    doc = parse_xml(webpage)
  File "/usr/local/bin/youtube-dl/youtube_dl/utils.py", line 1409, in parse_xml
    return xml.etree.ElementTree.XML(s.encode('utf-8'), **kwargs)
  File "/usr/lib/python2.6/xml/etree/ElementTree.py", line 963, in XML
    parser.feed(text)
  File "/usr/lib/python2.6/xml/etree/ElementTree.py", line 1245, in feed
    self._parser.Parse(data, 0)
ExpatError: syntax error: line 1, column 0
Traceback (most recent call last):
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 516, in extract_info
    ie_result = ie.extract(url)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 168, in extract
    return self._real_extract(url)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/generic.py", line 751, in _real_extract
    raise ExtractorError('Unsupported URL: %s' % url)
ExtractorError: Unsupported URL: http://video.wikia.com/wiki/File:Star_Trek_Original_Series_Doesn%27t_Make_Sense; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type  youtube-dl -U  to update.