[Qub] no video formats found (for some videos)

[ProgrammerAKL]

Checklist

• I'm reporting a broken site support
• I've verified that I'm running youtube-dl version 2020.12.29
• 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

youtube-dl.exe "https://www.qub.ca/tvaplus/tva/les-feux-de-l-amour/saison-16/episode-10094-1012531852" --verbose --list-formats
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['https://www.qub.ca/tvaplus/tva/les-feux-de-l-amour/saison-16/episode-10094-1012531852', '--verbose', '--list-formats']
[debug] Encodings: locale cp1252, fs mbcs, out cp437, pref cp1252
[debug] youtube-dl version 2020.12.29
[debug] Python version 3.4.4 (CPython) - Windows-10-10.0.18362
[debug] exe versions: none
[debug] Proxy map: {}
[Qub] 1012531852: Downloading JSON metadata
[debug] Using fake IP 99.232.39.92 (CA) as X-Forwarded-For.
[brightcove:new] 6216552780001: 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\tmpfx0ls98k\build\youtube_dl\YoutubeDL.py", line 803, in wrapper
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpfx0ls98k\build\youtube_dl\YoutubeDL.py", line 824, in __extract_info
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpfx0ls98k\build\youtube_dl\extractor\common.py", line 532, in extract
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpfx0ls98k\build\youtube_dl\extractor\brightcove.py", line 681, in _real_extract
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpfx0ls98k\build\youtube_dl\extractor\brightcove.py", line 552, in _parse_brightcove_metadata
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpfx0ls98k\build\youtube_dl\extractor\common.py", line 1367, 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

The [Qub] extractor works well for the majority of videos, but some keep returning the 'No video formats found' message (possibly related to an ad-roll preceding the video?)