The thing that I’ve seen my team use it most for is explaining blocks of code. We maintain a bunch of legacy systems that don’t get touched often and are written in stacks that our engineers aren’t completely fluent with, and it can be helpful when they’ve traced an issue to a particular function but the original intent or purpose of the code is obtuse.
I purchased a year of YouTube premium while I was on holiday in Turkey and it didn’t cost much. I mostly did it for YouTube music but the no ads thing is pretty great too.