Thanks for the info, but no, I do not have a TFT monitor.
I am using a run of the mill 17" SVGA monitor (Phillips Brilliance 107P).
By the way, don't ever buy that monitor.
I read that other thread and tried every combination of the nvAGP value (even rebooted between changes just in case), but still have the same problem.
For now, I guess I will just have to switch to low res (1600x1200x16x60) when watching videos. I normally run my desktop at 1920x1440x16x60.
I tried taking a screenshot of the video, but can't seem to get the xv video output in the screenshot (its all blue). Maybe I'll take a shot with a camera...