youtube-dl 2020.12.31

Core

• [utils] Accept only supported protocols in url_or_none
• [YoutubeDL] Allow format filtering using audio language (#16209)

Extractors

• [redditr] Extract all thumbnails (#27503)

• [vvvvid] Improve info extraction

• [vvvvid] Add support for playlists (#18130, #27574)
• [yandexdisk] Extract info from webpage

• [yandexdisk] Fix extraction (#17861, #27131)
• [yandexvideo] Use old API call as fallback
• [yandexvideo] Fix extraction (#25000)

• [nbc] Remove CSNNE extractor

• [nbc] Fix NBCSport VPlayer URL extraction (#16640)

• [aenetworks] Add support for biography.com (#3863)

• [uktvplay] Match new video URLs (#17909)
• [sevenplay] Detect API errors
• [tenplay] Fix format extraction (#26653)
• [brightcove] Raise error for DRM protected videos (#23467, #27568)