It's fair if you want to argue that posting Youtube videos is an essential service. I would argue pretty strenuously that it is not. I might even be convinced that facebook or twitter might fall into that category (but then I would probably argue that the service would need to be forcibly federated in that case). Posting a video on Youtube is publishing, not personal communication. Forcing publishers to show your message to the world is not free speech -- even if they are the only popular publisher on the planet.