I want to clone/copy/move all videos from the "Watch later" playlist to a new one.
Previously the method was to go to this address
https://www.youtube.com/playlist?list=WL&advanced_settings=1&disable_polymer=1 clicking the 3-dot-menu and selecting "Add all to".
Currently that URL is redirected to https://www.youtube.com/playlist?list=WL and the 3-dot-menu there does not contain "Add all to" anymore. Other playlists have this option in the menu, but not "Watch later".
My searches come up with even older/simpler methods, but none are current. Seems that this worked until 1/1/21 and even I used it in the past. But now (28/3/21) it seems to be gone.
What is the current method?