7Plus no longer working

[bbb62]

Checklist

• I'm reporting a broken site support
• I've verified that I'm running youtube-dl version 2020.07.28
• I've checked that all provided URLs are alive and playable in a browser
• I've checked that all URLs and arguments with special characters are properly quoted or escaped
• I've searched the bugtracker for similar issues including closed ones

Verbose log

[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['--verbose', 'https://7plus.com.au/absentia?episode-id=ABSE01-001']
[debug] Encodings: locale cp1252, fs mbcs, out cp850, pref cp1252
[debug] youtube-dl version 2020.07.28
[debug] Python version 3.4.4 (CPython) - Windows-7-6.1.7601-SP1
[debug] exe versions: none
[debug] Proxy map: {}
[7plus] ABSE01-001: Downloading JSON metadata
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\ytdl-org\tmpq2whuxta\build\youtube_dl\YoutubeDL.py", line 797, in extract_info
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpq2whuxta\build\youtube_dl\extractor\common.py", line 530, in extract
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpq2whuxta\build\youtube_dl\extractor\sevenplus.py", line 61, in _real_extract
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpq2whuxta\build\youtube_dl\extractor\brightcove.py", line 551, in _parse_brightcove_metadata
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpq2whuxta\build\youtube_dl\extractor\common.py", line 1350, 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.

Description

7Plus (which I think uses Brightcove) had been working for a long time - but stopped working around the 28th July so I switched to the latest version (as it was updated that day) but still no joy. Everything still works as normal in a browser. Also just to add the example URL above fails in this way but so do any other URL's from the site (i.e. it's not just this one).

ADDITIONAL INFO: I had some time to mess about with this and found that in brightcove.py in the function _parse_brightcove_metadata on this line (around 479 though it may have moved in my source as I've been putting in debug)

if ext == 'ism' or container == 'WVM' or source.get('key_systems'):

key_systems now exists in the JSON data returned - this causes the routine to abort. I assume that's some kind of license keying system which wasn't there before. Looks like it's com.apple.fps.1_0 Fairplay DRM.

I know nothing about this DRM so beyond my knowledge to go further - but may be helpful to anyone else looking at this - or if not possible to overcome then save anyone wasting time on it.