I'm guessing you've either ignored what I said about yt-dlp or tried it and it didn't work.
Has it occurred to you that as a subscription based service they probably
DON'T WANT YOU DOWNLOAD THEIR VIDEOS and have put something in place to stop it.
I'm not going to subscribe just to prove you wrong but I'll not-so-gently tell you again - try yt-dlp. Use the
-v switch to give you some info if there's errors.