I’m not even sure what you’re arguing for since you seemed to have done a complete 180 on your stance. You earlier said you don’t want YouTube adjudicating the law (by choosing sides in a copyright claim), but now you’re arguing that they have to do this in order to avoid liability. I see the problem.

EG Young people may not buy alcohol. When a cashier asks for ID, they are not adjudicating the law but following it. Right?

When you personally copy something, you must follow the law. EG When you re-upload some image for use on Lemmy, you must "judge" if you can legally do so. Maybe it's fair use, but that's not as straight as age. When you make the call, that does not mean that you adjudicate the law.

Under US law, someone can send a DMCA notice to the server. If the server owner ignores the take-down request, then they become liable to pay damages for the copyright infringement. Maybe the owner decided that it was a case of fair use, but that does not mean they adjudicate the law.

I hope that helped.

The issue here is copyright trolls claiming copyright over things that don’t belong to them.

That is criminal fraud. A copyright troll usually means someone on the legal side.

Currently, these cases are reviewed by bots,

That is wrong. But thank you for helping me understand the problems of the people here.