here’s an independent site for fandom haters: https://dcuguide.com/w/Catgirl_(Kitrina_Falcone)

You can get all the IDs using yt-dlp

yt-dlp --flat-playlist --print id <playlist>

Assuming you’re on linux, you can add >> ids_all.txt at the end to save the list to a file.

You can also add

--compat-options no-youtube-unavailable-videos

to get only the list of available videos instead and then, again assuming you’re on linux, do

diff ids_all.txt ids_available.txt

to get the odd ones out. That’s the simplest I could come up with. You’ll have to hope you can use the wayback machine, or a good old exact search to turn up what video that ID actually referred to