The "Stream" button the front of all Videon devices is used to enable/disable a stream.
The functionality of this button on non-legacy Videon products is to enable/disable all configured RTMP otuputs. Nothing else is currently controlled by the "Stream" button.
If at least one configured RTMP output is ON, the button will turn all RTMP Outputs OFF. If all RTMP outputs are off, the button will attempt to start all configured RTMP outputs.