MPD manifest cannot be downloaded

[beta2k]

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• I've verified and I assure that I'm running youtube-dl 2018.09.10

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• At least skimmed through the README, most notably the FAQ and BUGS sections
• Searched the bugtracker for similar issues including closed ones
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• 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)
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Description of your issue, suggested solution and other information

I would like to download live videos from the ITF tennis page: http://live.itftennis.com/en/live-streams/

Right now, for instance, the following live stream is online: http://live.itftennis.com/en/live-streams/video.php?vid=15626692

youtube-dl does not support the page right now, so the typical procedure yields an error:

youtube-dl.exe -f best http://live.itftennis.com/en/live-streams/video.php?vid=15626692
[generic] video: Requesting header
WARNING: Falling back on generic information extractor.
[generic] video: Downloading webpage
[generic] video: Extracting information
ERROR: Unsupported URL: http://live.itftennis.com/en/live-streams/video.php?vid=15626692

As a next step, I tracked down the URL to the manifest file via my browser's dev tools. The URL is http://live.itftennis.com/en/live-streams/video.php?vid=15626692.

Hence, I tried the following statement:

youtube-dl.exe -v -f best "https://sportradar-lco.akamaized.net/14879/15626692/dash/desktop/Tennis_ITFMen_SpainF27SinglesQualifying_delayed_15626692.mpd?cid=14879&mid=15626692&ecid=&hdnts=ip=188.21.12.146~exp=1536829286~acl=%2F14879%2F15626692%2Fdash%2Fdesktop%2F%2A~hmac=54060236f2144ffad6441eda263ac92ce4178c5f23b4189472e80bb8c457c46d"
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-v', '-f', 'best', 'https://sportradar-lco.akamaized.net/14879/15626692/dash/desktop/Tennis_ITFMen_SpainF27SinglesQualifying_delayed_15626692.mpd?cid=14879&mid=15626692&ecid=&hdnts=ip=188.21.12.146~exp=1536829286~acl=%2F14879%2F15626692%2Fdash%2Fdesktop%2F%2A~hmac=54060236f2144ffad6441eda263ac92ce4178c5f23b4189472e80bb8c457c46d']
[debug] Encodings: locale cp1252, fs mbcs, out cp850, pref cp1252
[debug] youtube-dl version 2018.09.10
[debug] Python version 3.4.4 (CPython) - Windows-10-10.0.16299
[debug] exe versions: ffmpeg N-90306-g688060fbb7, ffprobe N-90306-g688060fbb7
[debug] Proxy map: {}
[generic] Tennis_ITFMen_SpainF27SinglesQualifying_delayed_15626692.mpd?cid=14879&mid=15626692&ecid=&hdnts=ip=188.21.12: Requesting header
WARNING: Falling back on generic information extractor.
[generic] Tennis_ITFMen_SpainF27SinglesQualifying_delayed_15626692.mpd?cid=14879&mid=15626692&ecid=&hdnts=ip=188.21.12: Downloading webpage
[generic] Tennis_ITFMen_SpainF27SinglesQualifying_delayed_15626692.mpd?cid=14879&mid=15626692&ecid=&hdnts=ip=188.21.12: Extracting information
ERROR: No video formats found; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
Traceback (most recent call last):
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmp0icdbhzn\build\youtube_dl\YoutubeDL.py", line 792, in extract_info
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmp0icdbhzn\build\youtube_dl\extractor\common.py", line 502, in extract
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmp0icdbhzn\build\youtube_dl\extractor\generic.py", line 2346, in _real_extract
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmp0icdbhzn\build\youtube_dl\extractor\common.py", line 1281, in _sort_formats
youtube_dl.utils.ExtractorError: No video formats found; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.

If I download the manifest file via the browser by entering the URL in the address bar, an XML file is downloaded. The XML file looks like this.

The following ffmpeg command works and records the stream:

ffmpeg -i "https://sportradar-lco.akamaized.net/14879/15626692/dash/desktop/Tennis_ITFMen_SpainF27SinglesQualifying_delayed_15626692.mpd?cid=14879&mid=15626692&ecid=&hdnts=ip=188.21.12.146~exp=1536829286~acl=%2F14879%2F15626692%2Fdash%2Fdesktop%2F%2A~hmac=54060236f2144ffad6441eda263ac92ce4178c5f23b4189472e80bb8c457c46d" -c copy output.ts

The best case would be that youtube-dl supports this page out of the box. I think it cannot be that difficult, because the above ffmpeg command already works. So somehow youtube-dl should corrreclty find the manifest file and then pass it to ffmpeg. The next best case would be that youtube-dl would support this page by using the manifest file url.

To reproduce the issue, a live stream needs to be running. You can find the URL of a live stream by visiting the page http://live.itftennis.com/en/live-streams/ and then choosing one of the live streams linked at the top (if there are any). The url should look like this: http://live.itftennis.com/en/live-streams/video.php?vid=15626692

Thank you very much!