We have UStream and Twitch streaming on the PlayStation 4. Pretty soon, you're going to be able to share on the largest video sharing network in the world.
YouTube sharing will be available in the future and accessible via the Share button on the DualShock 4 controller. Just press and select YouTube to upload your content to the network.
I've been uploading some of my streams to YouTube so this is one nice easy step now to be able to do that without having to go through a service like Twitch.