Great progress.... HOWEVER - It would be much better if you could use 2 pads connected.
USB-C 1 port = Controller 1
USB-C 2 port = Controller 2
Then connect Mini HDMI and use the RG350 as a console. There would be less chance of damaging the RG350 with controller coming out of the top of the unit.
My thinking is "Multiplayer" gaming with friend can get frantic and you would have more chance of damaging the unit if player one is using it as a controller.
Make sense ?
Great work, thanks
EDIT: Just seen the other video with the USB HUB and 2 players, so I guess its already possible