SkillsMatter Video not Downloading

[psibi]

Youtube-dl version I'm using:

$ youtube-dl --version
2015.07.07

I'm trying to download a video from skillsmatter. But it's not getting downloaded. Skillsmatter internally uses Vimeo.

Video URL: https://skillsmatter.com/skillscasts/4251-lenses-compositional-data-access-and-manipulation

$ youtube-dl --verbose https://skillsmatter.com/skillscasts/4251-lenses-compositional-data-access-and-manipulation
[debug] System config: []
[debug] User config: []
[debug] Command-line args: [u'--verbose', u'https://skillsmatter.com/skillscasts/4251-lenses-compositional-data-access-and-manipulation']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2015.07.07
[debug] Python version 2.7.6 - Linux-3.16.0-30-generic-x86_64-with-Ubuntu-14.04-trusty
[debug] exe versions: avconv 11.3, avprobe 11.3, rtmpdump 2.4
[debug] Proxy map: {}
[generic] 4251-lenses-compositional-data-access-and-manipulation: Requesting header
WARNING: Falling back on generic information extractor.
[generic] 4251-lenses-compositional-data-access-and-manipulation: Downloading webpage
[generic] 4251-lenses-compositional-data-access-and-manipulation: Extracting information
ERROR: Unsupported URL: https://skillsmatter.com/skillscasts/4251-lenses-compositional-data-access-and-manipulation
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/generic.py", line 1092, in _real_extract
    doc = parse_xml(webpage)
  File "/usr/local/lib/python2.7/dist-packages/youtube_dl/utils.py", line 1562, in parse_xml
    tree = xml.etree.ElementTree.XML(s.encode('utf-8'), **kwargs)
  File "/usr/lib/python2.7/xml/etree/ElementTree.py", line 1300, in XML
    parser.feed(text)
  File "/usr/lib/python2.7/xml/etree/ElementTree.py", line 1642, in feed
    self._raiseerror(v)
  File "/usr/lib/python2.7/xml/etree/ElementTree.py", line 1506, in _raiseerror
    raise err
ParseError: not well-formed (invalid token): line 22, column 312
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/youtube_dl/YoutubeDL.py", line 654, in extract_info
    ie_result = ie.extract(url)
  File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 273, in extract
    return self._real_extract(url)
  File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/generic.py", line 1663, in _real_extract
    raise UnsupportedError(url)
UnsupportedError: Unsupported URL:
https://skillsmatter.com/skillscasts/4251-lenses-compositional-data-access-and-manipulation

[yan12125]

FYI: SkillsMatter is not supported yet.

[psibi]

@yan12125 SkillsMater uses Vimeo.

[yan12125]

Logging in is not implemented yet, and seems video URLs are available only if logged in.

[dstftw]

Duplicate of #1883.