Those files aren't working out of box and haven't found solution yet to watch em in Firefox.
Web TV's like http://areena.yle.fi
doesn't work at all in firefox. Have you been able to make these formats to work. I have Sabayon 4.1 Gnome installed on my laptop and this is so far only mediafile probleam, I've had. So I don't want to change distro cause of this.