I think I would post this here.
I finally have openSUSE installed and changed exactly how I want it!. 
I installed google chrome because it’s always been faster than firefox for me. When I watch youtube videos in google chrome in full screen mode it just displays a blue screen, but the audio is working.
I have the AMD display driver already (fglrx)
I don’t believe it’s a graphics issue (could be wrong) because full screen works fine and dandy for firefox. So is this just a chrome bug?
Well, chrome brings its own version of flash-player, whereas Firefox uses the system’s one.
You could try chromium, that’s the open source version of chrome and included in openSUSE. This does not include a flash-player, although it is available separately as “chromium-pepperflash”. But if that package is not installed, it should just use the standard flash-player, like Firefox does.
Or try to disable hardware acceleration in Chrome’s flash player by right-clicking on a video and choosing “Settings”.
You could also try the HTML5 version of youtube instead of flash, see also your other thread.