I had hundreds of videos in my Youtube account’s Watch Later list. Trouble is that there are lot of restrictions on this special list, and there is no option to move videos to another playlist in bulk.

So after searching a lot on the interwebs, I came across this brilliant hack: https://www.reddit.com/r/youtube/comments/i4oxuc/youtube_watch_later_playlist_move/

Now there is no direct way to delete all videos from the Watch Later list, but fortunately there is a hack for that as well: https://www.reddit.com/r/youtube/comments/i4oxuc/youtube_watch_later_playlist_move/ggfodf4/?utm_source=reddit&utm_medium=web2x&context=3

Please note that the script mentioned in the thread is subject to change. It’s best to use the Github link directly: https://gist.github.com/astamicu/eb351ce10451f1a51b71a1287d36880f