I recently test html5 Youtube for the first time on my PC, it works indeed (even a litle bit weird) so I wonder how good HTML5 Youtube Videos work on the Pandora, performance wise. Not tested but on my PC they need alot of CPU power which is bad.
It's actualy a little bit disappointing because everyone wants to push HTML5 and get rid of FLASH but it seemed nobody mentioned the much higher CPU load of any HTML5 Video. This way, FLASH will last much longer than needed it seems, until HTML5 performs better.