I have yet to see a good browser implementation of the video tag: <a href="http://playground.html5rocks.com/#video_tag" rel="nofollow">http://playground.html5rocks.com/#video_tag</a><p>I've tried it in Chrome 6, Firefox 3.6, Opera 10.5. All of them play the video but the controls are really bad. You can't tell how much of the video is loaded in any browser. In Chrome, you can't skip to the middle of the video even after it has fully loaded and played. In Firefox, it says the video is only 5-7 seconds long and the trackbar keeps extending the length as the video plays.<p>As bad as the YouTube Flash player can get sometimes at actually playing a video (I'm guessing because of bandwidth/popularity issues), it is a damn good implementation. You can skip to the middle of a video, you can jump to any section of the video that has already loaded. Play/pause work very smoothly. I'm not saying HTML5 video will never be good but all the current implementations remind me of the time before Flash video when Quicktime MOV was the only way to watch a video and it was a horrible experience.