why does video playback do this?

That /\

... why does it do that? it is also BOGGING my system when it turns all green, it only "bogs" using quicktime, this also happens occasionally using media player, what i find fixes it however is if i scroll down the page and it will go away and the video will play BUT as you can see there is no scroll... HELP!

 

Are you using the latest driver for your GFX card ?.

For QuickTime you can try using QuickTime Alternative
http://www.free-codecs.com/download/QuickTime_Alternative.htm

 

yes im using latest drivers, will try the alternative :O thanks!

Will post back with results.