You can use Playback’s simulcast feature to send your Playback live stream to Twitch.
Playback uses RTMP (Real-Time Messaging Protocol) to broadcast live Playback streams to other platforms. RTMP is a standard protocol supported by many applications, including popular live streaming platforms like YouTube, Facebook, Twitch and Twitter.
Twitch provides users with a stream key so they can use streaming software like Playback to create a live Twitch broadcast.
Next you will need to add your Twitch stream key to Playback. You’ll only need to do this once.
Each time you go live, you will need to repeat these steps to start a simulcast.