If the YouTube HTML5 player isn't working for you, you might need to opt-in to their HTML5 trial, here: http://www.youtube.com/html5
YouTube HTML5 Video Player
This is an opt-in trial of HTML5 video on YouTube. If you are using a supported browser, you can choose to use the HTML5 player instead of the Flash player for most videos. Your comments will help us improve and perfect the mixtures we're working on. So jump in, play around, and send your feedback directly to the brains behind the scenes.
Supported Browsers
We support browsers that support both the video tag in HTML5 and either the h.264 video codec or the WebM format (with VP8 codec). These include:
- Firefox 4 (WebM, Beta available here)
- Google Chrome (h.264 supported now, WebM enabled version available via Early Release Channel)
- Opera 10.6+ (WebM, Available here)
- Apple Safari (h.264, version 4+)
- Microsoft Internet Explorer 9 (h.264, Beta available here)
- Microsoft Internet Explorer 6, 7, or 8 with Google Chrome Frame installed (Get Google Chrome Frame)
Notes
- Fullscreen support is partially implemented. Pressing the fullscreen button will expand the player to fill your browser. If your browser supports a fullscreen option, you can then use that to truly fill the screen
- The HTML5 player has a badge in the control bar. If you don't see the "HTML5" icon in the control bar, you've been directed to the Flash player (due to restrictions listed below)
- The HTML5 player also has a badge to indicate the video is using the WebM format. If you don't see the "WebM" icon, the video is encoded using h.264
- If you want to find videos with WebM formats available, you can use the Advanced Search options to look for them (or just add &webm=1 to any search URL)
Additional Restrictions (we are working on these!)
- Videos with ads are not supported (they will play in the Flash player)
- On Firefox and Opera, only videos with WebM transcodes will play in HTML5
- If you've opted in to other testtube experiments, you may not get the HTML5 player (Feather is supported, though)
You are currently in the HTML5 trial.
via youtube.com
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