lokni

Are you resizing the video at all in the browser? When messing around with it, I found that I could play 720p video with the video tag smoothly without any formatting in Chrome and Firefox, but that setting it's size attributes to something other than the actual file size made it slow to the point of being unwatchable.

Looks nice, however, clicking the back and forward buttons doesn't do anything for me using chromium on ubuntu (worked in firefox). It seems you are using the jquery history plugin to manage this, and trying the demo page at that plugin, it didn't work either. It seems that jQuery.browser.safari is set to true when it shouldn't be is causing the problem. If I set jQuery.browser.safari = false, the back and forward commands work on the demo page and your site. Not sure how you would test for difference between chrome and safari, but figured I'd let you know anyway.