Commentary and criticism are by law protected as fair use. Why would revenue share be done "ideally"? News reporting is also covered under fair use, do you expect news organizations to pay for reporting on movies?
Ideally fair use would be defended, it is the law of the land, and when a takedown notice was emitted maliciously, with known bad faith, the actor that did that would have to pay for the amount of time that the legal content was down.
I don't think those laws will last. They were written in the 70s before youtube. Ideally the law would allow the critique but recongize it's the IP drawing in the users, and sharing some of the revenue.
I believe the parent comment was saying that the YT poster should have gotten some revenue share. Since the work they put in would in theory be enhancing the original work. Obviously these sort of things are created and consumed primarily by “super fans” who probably buy director cuts etc etc .
At least that’s how I read the comment and I agree.