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RossMc

macrumors 65816
Original poster
This has started to happen recently when I have been watching Youtube videos in HD.

It's kind of like a flash of pixels or something on the screen every so often.

I have just found a random video on Youtube and played it in HD and managed to get a video of whats happening. It happens around 6 second in and at the end as well.

Anyone know what could be causing it, Is it a graphics card problem? (It happens whichever browser I use)

http://www.youtube.com/watch?v=WattgqxN01A
 
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