You can file a report to with your local police department or the FBI if you’re in the United States. This is called extortion and is against the law unless this is the person and will have to prove and fail a civil suite. You tube should remove this once talk to shroud.
Ultimately once you tube finds out this is all bs they will let you know that they arnt going to do anything to you because this user is seeking retribution on public videos and isn’t causing defamation of his name. They will also likely seek some sort of punishment against him