On 11/05/2010 02:23 PM, Jiří Navrátil wrote: > on http://www.navratil.cz/SFD2010/ , but Google Chrome and Opera are > working fine. > > Is my HTML5 page correct? Or what I shall change to make it working in > Firefox too, please? > your webserver does not send the right mimetype. it sends text/plain but has to send video/ogg for .ogv files j