I’m mostly working with two monitors with the camera in between. I prefer to have the browser window part with the tile videos half on the left monitor and half on the right one. Via this arrangement my eyes are quite close to looking in the camera.
What I mean with orthogonal? Well, when I imagine 8 participants then the above two rows each have three tiles while the lower row has two tiles - centered. I’d want to be able to have them left or right justified. So you’ll have an empty tile exactly below a filled tile. As such I can trim the window such, that one column is on the left monitor, and two on the right monitor.
Of course one could resize the window such that I have a 4x2 array. Well, let me then imaging 7 tiles ;-).