[Plugin: MediaElement.js – HTML5 Video & Audio Player] MediaElements.js WordPress 3.3

I am using this shortcode:

[video mp4="https://mywebsite.com/wp-content/uploads/2011/03/mp4video.mp4" video ogg="https://mywebsite.com/wp-content/uploads/2011/03/theoravideo.ogv" webm="https://mywebsite.com/wp-content/uploads/2011/03/webmvideo.webm" poster="https://mywebsite.com/wp-content/uploads/2011/02/picture.png" preload="true" width="480" height="270"]

So actually it should run fine in Firefox but it doesn’t.

PS: Today I updated FF to version 9 but still having the same problem.

Try without the second “video” keyword in the shortcode. It should look like this:
[video mp4="https://mywebsite.com/wp-content/uploads/2011/03/mp4video.mp4" ogg="https://mywebsite.com/wp-content/uploads/2011/03/theoravideo.ogv" webm="https://mywebsite.com/wp-content/uploads/2011/03/webmvideo.webm" poster="https://mywebsite.com/wp-content/uploads/2011/02/picture.png" preload="true" width="480" height="270"]

Oh, that was just a typo I made only here. My problem was I didn’t had set the correct mime-types in my .htaccess file. After following this tutorial all was fine:

—
Ensure your server is using the correct mime-types. Firefox will not play the Ogg video if the mime-type is wrong. Place these lines in your .htaccess file to send the correct mime-types to browsers

AddType video/ogg .ogv
AddType video/mp4 .mp4
AddType video/webm .webm

—

Thanks for the help web4ceone. ??