A little while ago Xbox had a build-in broadcast towards Mixer which allowed you to turn your camera in full-screen, see a preview of your camera, change the location and zoom options. Now through the Twitch App it's sadly only possible to change the location.

Please add the following to the Twitch App on consoles (Xbox)
- preview camera
- zoom functions
- full screen mode

This way console streamers can make better use of their camera whilst streaming and it makes having "Just Chatting" streams a lot more comfortable.