[vhx] Add support for VHX.tv

[deadman36g]

Please follow the guide below

• You will be asked some questions and requested to provide some information, please read them carefully and answer honestly
• Put an x into all the boxes [ ] relevant to your issue (like this: [x])
• Use the Preview tab to see what your issue will actually look like

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Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2017.11.15. If it's not, read this FAQ entry and update. Issues with outdated version will be rejected.

• I've verified and I assure that I'm running youtube-dl 2017.11.15

Before submitting an issue make sure you have:

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

What is the purpose of your issue?

• Bug report (encountered problems with youtube-dl)
• Site support request (request for adding support for a new site)
• Feature request (request for a new functionality)
• Question
• Other

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The following sections concretize particular purposed issues, you can erase any section (the contents between triple ---) not applicable to your issue

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

youtube-dl --verbose https://troma.vhx.tv/witchcraft-666/videos/witchcraft-666
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'--verbose', u'https://troma.vhx.tv/witchcraft-666/videos/witchcraft-666']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2017.11.15
[debug] Python version 2.7.10 - Darwin-17.2.0-x86_64-i386-64bit
[debug] exe versions: ffmpeg 3.3.4, ffprobe 3.3.4
[debug] Proxy map: {}
[generic] witchcraft-666: Requesting header
WARNING: Falling back on generic information extractor.
[generic] witchcraft-666: Downloading webpage
[generic] witchcraft-666: Extracting information
ERROR: Unsupported URL: https://troma.vhx.tv/witchcraft-666/videos/witchcraft-666
Traceback (most recent call last):
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/generic.py", line 2170, in _real_extract
    doc = compat_etree_fromstring(webpage.encode('utf-8'))
  File "/usr/local/bin/youtube-dl/youtube_dl/compat.py", line 2539, in compat_etree_fromstring
    doc = _XML(text, parser=etree.XMLParser(target=_TreeBuilder(element_factory=_element_factory)))
  File "/usr/local/bin/youtube-dl/youtube_dl/compat.py", line 2528, 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: syntax error: line 1, column 0
Traceback (most recent call last):
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 784, in extract_info
    ie_result = ie.extract(url)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 437, in extract
    ie_result = self._real_extract(url)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/generic.py", line 3075, in _real_extract
    raise UnsupportedError(url)
UnsupportedError: Unsupported URL: https://troma.vhx.tv/witchcraft-666/videos/witchcraft-666

This site does require a paid subscription which I have and can use to help solve

[Karmak23]

Hello. I think the issue should be re-labelled VHX.tv (not troma), because I've got one which is https://whynothome.vhx.tv/ for a documentary, and VHX.tv seems to be a generic hoster for VOD.

[07416]

@deadman36g Did you provide account credentials for the maintainers? vhx.tv isn't on the list of supported websites.

[deadman36g]

I no longer have an account to use, but I believe at the time I used the --cookies option

[trapexit]

I have account credentials if needed for troma.vhx.tv