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.
As well you tube could get into trouble if they allow this type of behavior regardless if it’s the real person because it’s considered extortion. The only time this can get you in trouble is when you are going against copy rights or bashing them publicly from a platform.