1080p hd video streaming and ipad1 and ios5.0.1

I recently updated my ipad1 to ios5.0.1. I noticed when I go to view 1080p qualitity hd videos online, the quality is not as good as it was before I updated.

Anyone know why?

I rebooted, restarted, closed iCloud, etc... Still, the 1080p hd quality videos not as clear as was before on my iPad 1.

Any advice? Help? Thx .