I'm running x.org without a window manager to play videos in a loop. 
This works beautifully except that when moving down the playlist if a
video is a different size than the one that precedes it, you can see
the image flicker and catch a glimpse of the ugly X gray background.

I've tried adding this to my .xsession file:

xsetroot -solid black -fg black s off

But I still see the ugliness.  Any other ideas out there?

--
Donovan Niesen