I had 3 HD videos open on my MBP on YouTube in three separate Safari tabs and noticed one of them starting to chop up as the other two loaded. Switched to dashboard to look at iStat Pro and noticed the CPU usage absolutely going through the roof! Shocking really. The heat was pretty mad too. Same three videos in HTML5, no problems, and only small movement on the CPU usage. Only problem is lack of 480p and full screen. I've checked out Clicktoflash but I can't seem to get YouTube vids to play in H.264? Any help there? I have it selected but they seem to just open in Flash?