YoYoCome 3 years ago I am using Mid 2009 MacBook Air and I am having choppy playback on Vimeo HTML5 with the following 2 videos: vimeo.com/21216091 vimeo.com/64532461 I've used both Chrome and Safari and playback is choppy on both browsers. Chrome runs laggy and choppy throughout the videos. Safari runs better than Chrome since it will run smooth partially and then gets choppy on some segments then play smooth again. I am playing videos with HD on and the done with buffering . I get the same choppy results non-fullscreen and fullscreen. Is there a fix for this problem? Thank you very much for your help.