Unless I am missing something, I am not sure this will work. What I am doing is sending my 2 camera feeds to one of my outputs with these 2 commands
xcommand video matrix assign layout:equal mode:replace output:2 sourceid:1
xcommand video matrix assign layout:equal mode:add output:2 sourceid:2
Afterwards, I would like to send the same image to the far end, I am not sure how I would achieve that with the layout command