youtube-dl -i -f mp4 --yes-playlist 'playlist url'
youtube-dl -o "%(playlist_index)s-%(title)s.%(ext)s" "PLAYLIST_URL"
youtube-dl -i 'Address of List=? in URL of Youtube playlist'
youtube-dl --yes-playlist -f best -ciw -o "${outdir}/%(uploader)s/playlists/%(playlist)s/videos/%(playlist_index)s - %(title)s.%(ext)s" -v $channel_url