Double fullscreen on 1 monitor

[PlatypusDK]

Im looking for a solution that would make it possible to view 2 fullscreen videos at the same time on a single monitor.
I have tried to use the "stack windows" function, but that doesnt stack the picture from the videos, it just shows half of it

 

[Alabalcho]

It is called "fullscreen" for a reason...
Unless you have very fancy monitor / tv with PIP support, and two video outputs...

 

[PlatypusDK]

So there is no way to virtually create a splitscreen on a single monitor?