In the upper right corner of the button.
3 broadcast quality,
You turn on and off the camera and microphone yourself. To do this, click on the appropriate icon.
If the option is enabled, they must be green. If the video freezes, you can reduce the load on the video stream. The quality of the broadcast can be adjusted. To do this, slide the slider to the left or right.
The setting allows you to return to the setting and change the camera or microphone with which you will be broadcasting.