All my videos on my internet look pixelated?

[Merrysquirrel426]

Hello! Recently on my computer I've encountered an error with the playback of videos online. Here's a picture so you can see what I mean: http://i.imgur.com/gnzOp2h.png . Now I've tried just about everything in my knowledge:

Clear browser history/cache
Tried different browsers
Restarted computer
Updated Flash player
Updated video drivers

Plus I've searched all over the internet. This is the first time the problem has occurred and I don't believe it's due to a slow connection or a slow computer. I'm using Bell Aliant's FibreOp internet with a download speed of 80mbps & upload speed of 30mbps. Plus this is a custom built PC, only 2 years old with an AMD FX-8150 processor, PowerColor Radeon 7850 graphics card, and 8 GB's of G.Skill RipJaws RAM. So as far as my knowledge goes, I'm out of luck. If you have any suggestion at what the problem may be, I would love to hear it!

Thanks!
-Brandon
Forgot to mention that it's not just YouTube, I've tried other services like Vimeo etc. Plus different videos, and different channels.

[Jodie]

Try reinstalling your graphics driver, or restoring it to default settings. The reason i say this is because
i have a radeon hd6950 and my videos looked similar when I tryed to change some settings in catalyst control center to make videos look better

If you didnt play with any settings, your gfx card could be overheating

[M.A.]

It's nothing to do with it being uploaded to them websites. It's to do with source. What camera it was taken by.

[Geri]

Graphics driver may have a problem, you can use the software update it!
If not, only to reinstall the system!