Add support for flogymnastics.com

[Ectomind1990]

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Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2017.08.18. 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 Issues with outdated version will be rejected.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 2017.08.18

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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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:

[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'-v', u'http://www.flogymnastics.com/video/1243006-eddie-penev-hits-double-double-triple-twist-2017-pg-championships-podium-training']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2017.08.18
[debug] Python version 2.7.12 - Linux-4.4.0-92-generic-x86_64-with-Ubuntu-16.04-xenial
[debug] exe versions: ffmpeg 2.8.11-0ubuntu0.16.04.1, ffprobe 2.8.11-0ubuntu0.16.04.1, rtmpdump 2.4
[debug] Proxy map: {}
[generic] 1243006-eddie-penev-hits-double-double-triple-twist-2017-pg-championships-podium-training: Requesting header
WARNING: Falling back on generic information extractor.
[generic] 1243006-eddie-penev-hits-double-double-triple-twist-2017-pg-championships-podium-training: Downloading webpage
[generic] 1243006-eddie-penev-hits-double-double-triple-twist-2017-pg-championships-podium-training: Extracting information
ERROR: Unsupported URL: http://www.flogymnastics.com/video/1243006-eddie-penev-hits-double-double-triple-twist-2017-pg-championships-podium-training
Traceback (most recent call last):
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/generic.py", line 2077, 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 "/usr/lib/python2.7/xml/etree/ElementTree.py", line 1653, in feed
    self._raiseerror(v)
  File "/usr/lib/python2.7/xml/etree/ElementTree.py", line 1517, in _raiseerror
    raise err
ParseError: not well-formed (invalid token): line 10, column 408
Traceback (most recent call last):
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 776, in extract_info
    ie_result = ie.extract(url)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 433, in extract
    ie_result = self._real_extract(url)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/generic.py", line 2944, in _real_extract
    raise UnsupportedError(url)
UnsupportedError: Unsupported URL: http://www.flogymnastics.com/video/1243006-eddie-penev-hits-double-double-triple-twist-2017-pg-championships-podium-training

...
<end of log>

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If the purpose of this issue is a site support request please provide all kinds of example URLs support for which should be included (replace following example URLs by yours):

• Single video: https://www.flogymnastics.com/video/1243006
• Single video: https://www.flogymnastics.com/video/1243006-eddie-penev-hits-double-double-triple-twist-2017-pg-championships-podium-training
• Playlist: Not applicable

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Description of your issue, suggested solution and other information

Please add support for flogymnastics.com