I tried all of those and no results. So I took your original project and gave both players bound to layout. Then I set the canvas size to half of the viewport. This works nicely, but if the yellow player is by the edge, it doesn't paste outside of the layout and you can see the regular viewport on the right side. How could I make it so you can see outside of the layout when he is by the edge. If I can get this, split screen in in working order!
P. S. if this doesn't make sense, try it yourself.