I remember seeing video done this way on youtube during the 3D tv craze about 10 years ago (not the 3d stuff that youtube supported, this was just people messin

I remember seeing video done this way on youtube during the 3D tv craze about 10 years ago (not the 3d stuff that youtube supported, this was just people messing about with 2 images side by side). It worked about as well as the examples here, but was not a particularly comfortable experience for anything longer than a few minutes.