go to:
http://www.youtube.com/watch?v=cwBFmOW2tBA

Yes you can sign up for the html5 YouTube test, but not all videos will play with HTML5. There are some restrictions:

  --Videos with ads are not supported (they will play in the Flash player)
--On Firefox [includes SeaMonkey] and Opera, only videos with WebM transcodes will play in HTML5

How can you tell the video is played using html5? I'm on the Mac so I can kill (i.e. remove temporarily) the flash plugin process using the activity monitor's quit process. Then I can check whether the flash plugin is loaded when I play the YouTube video. If the flash plugin is not loaded then the video was played using html5. (On other OSs you can do this but I'm not sure how it is done.) When I killed the flash plugin flash did not reload proving Youtube played the video using HTML5 (if there is an embedded ad in the video the video will play using flash.

Chris Ilias wrote:
On 12-07-31 9:15 PM, Rufus wrote:
It looks like YouTube dosen't support HTML5 for SM at all at this point:

https://www.youtube.com/html5/

It doesn't list SeaMonkey on that page, but if you click "Join the HTML5
Trial" it will work.


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