Youtube: Move “Watch later” to new Playlist

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I want to add all search results to a playlist in youtube. The quickest way to do this seems to click the "watch later" icon on every video (1 click). Adding each video to an individual playlist is much slower (4 clicks)

However I want to create individual playlists for different searches, so I want to move all videos from the "watch later" playlist to a new one (simultaneously), so I can keep a structure.