You can stream from your PS4 to Twitch or YouTube by linking your accounts and pressing the Share button.

PS4 users may livestream gameplay to Twitch and Ustream video services. By pressing the Share button in-game and selecting Broadcast Gameplay, users can link their PS4 with a Twitch or Ustream ...

PS4 gets PlayStation streaming service tomorrow in private beta Select PlayStation 4 owners can try out Sony's upcoming streaming service starting tomorrow.