I can't see this working well at all if it does in fact happen. I cannot think of a single YouTube channel I would be willing to pay for to view. Not one. Sure, it'd be frustrating to not be able to watch some great videos, but I won't promote the concept by buying into it either.
I know I'm probably in the majority on this one. And so, everyone would end up losing money in the end. Not gonna happen. I hope.