video not working in firefox

Hello,

I have this code:

var vid = sym.$("video_holder");

vid.html('<video id= "video1" style="position:absolute; bottom:0px; right:0px; min-width:100%; min-height:100%; width:auto; height:auto; z-index:-1000; overflow:hidden"; autoplay=autoplay" <source src= "video/wall2.mp4" type= "video/mp4"> <source src= "video/wall2.ogv" type= "video/ogg" >  <source src= "video/wall2-2.webm" type= "video/webm"> " </video>');

I can see the video fullscreen in Chrome and Safari but not in Firefox.

Console says : Le « Content-Type » HTTP « video/mp4 » n'est pas géré. Le chargement de la ressource média file:///.../video/wall2.mp4 a échoué.

What I am missing?

thanks again