This is my story:
- YouTube has a limit of 5000 videos in a playlist. So, the default 'Watch Later' playlist was filled up quickly for me.
- Then I created a 2nd playlist named 'Watch Later 2' where I'm 3600 videos in. But now I've ditched this playlist for something new.
- Instead, now I simply open a video & close it, to add it to my History. 'History' also has a search button now, but it needs the exact video title I guess, no typos.
Also, I have a total of 84 different custom playlists that I've created for different topics & God knows the total number of videos they contain that need to be "watched later".
This is my life now in YouTube.