Shellchecked: 
No Youtube login needed !
youtube-dl.sh downloads automatic newest Videos into local download folder.
To use this script you need: Shell, yt-dlp fallback is now youtube-dl, Firefox (tested with 66 - 108), sqlite3 . //aria2 (fast download as an option)
No firefox, no problem , write your playlists to an array.
- There is a checker for dependencies: check.sh
- There is a notifier script for the Kubuntu desktop: yt-dl-send-notify.sh
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0 */2 * * * /home/foo/bin/youtube-dl.sh > /dev/null 2>&1
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0 * * * * XDG_RUNTIME_DIR=/run/user/$(id -u) /home/foo/bin/yt-dl-send-notify.sh
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update youtube-dl, may be useful (0 12 * * * youtube-dl -U)