Live Stream is a feature that early adopters of Display have access to. If you have access to Live Stream, follow these steps to use it:
1) Click the "+" at the bottom of your home screen
2) Click on the Dolby live stream icon all the way on the right on the bottom toolbar
3) Tap LIVE to start your Live Stream
Please note that if you have slow internet connection, you will be unable to stream. You must have an upload speed of 0.5 mb/s in order to stream