This is how I set up my Roland VR-1HD. I've also used the Roland for a two camera podcast with the awesome 'video follows audio' feature.
Revealing Meet Kevin's $200,000 YouTube Studio !!
https://youtu.be/cPOmbhkkUZs
Roland VR-1HD Streaming Mixer Tutorial #1: Basic Setup: https://youtu.be/pOfSROYIDMw