youtube-dl.exe -F https://www.youtube.com/watch?v=8Z1eMy2FoX4
youtube-dl -f 313+23 https://www.youtube.com/watch?v=8Z1eMy2FoX4
(Combine video + audio..)
youtube-dl --format bestaudio --audio-format mp3 --extract-audio --audio-quality 0
youtube-dl -f 140 -ciw -o "C:\youtubedl\Youtubedl_downloads%(title)s.%(ext)s" -v https://www.youtube.com/channel/UC5Ce1XGat0JJOXcFWZl1jcg
https://askubuntu.com/questions/856911/using-youtube-dl-to-download-entire-youtube-channel
Re-download: https://askubuntu.com/questions/673442/downloading-youtube-playlist-with-youtube-dl-skipping-existing-files