Add support for ehftv.com

[goggle]

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• 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:

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 "http://www.ehftv.com/int/video/velkovski-scores-between-galias-legs" -v --ignore-config
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['http://www.ehftv.com/int/video/velkovski-scores-between-galias-legs', '-v', '--ignore-config']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2018.01.21
[debug] Python version 3.6.4 (CPython) - Linux-4.14.14-1-ARCH-x86_64-with-arch
[debug] exe versions: ffmpeg 3.4.1, ffprobe 3.4.1, rtmpdump 2.4
[debug] Proxy map: {}
[generic] velkovski-scores-between-galias-legs: Requesting header
WARNING: Falling back on generic information extractor.
[generic] velkovski-scores-between-galias-legs: Downloading webpage
[generic] velkovski-scores-between-galias-legs: Extracting information
ERROR: Unsupported URL: http://www.ehftv.com/int/video/velkovski-scores-between-galias-legs
Traceback (most recent call last):
  File "/usr/lib/python3.6/site-packages/youtube_dl/YoutubeDL.py", line 784, in extract_info
    ie_result = ie.extract(url)
  File "/usr/lib/python3.6/site-packages/youtube_dl/extractor/common.py", line 438, in extract
    ie_result = self._real_extract(url)
  File "/usr/lib/python3.6/site-packages/youtube_dl/extractor/generic.py", line 3108, in _real_extract
    raise UnsupportedError(url)
youtube_dl.utils.UnsupportedError: Unsupported URL: http://www.ehftv.com/int/video/velkovski-scores-between-galias-legs

...
<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: http://www.ehftv.com/int/video/makaskov-scores-after-rebound
• Livestream: http://www.ehftv.com/int/livestream/sweden-norway-live

Note that youtube-dl does not support sites dedicated to copyright infringement. In order for site support request to be accepted all provided example URLs should not violate any copyrights.

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Description

Could we add ehftv.com support to youtube-dl? It provides videos and livestreams from the European Handball Federation. I took a quick look on the site and saw, that it is basically the same as Laola1.tv, so it should be pretty easy to add support for this too. If a main developer tells me how this sould be included properly into the existing information extractor for laola1.tv, I am willing to implement is.