videos just staying black

Hi,

 

I'm using Mozilla/5.0 (X11; Linux x86_64; rv:10.0.12) Gecko/20100101 Firefox/10.0.12 Iceweasel/10.0.12.

Unfortunately, for me the videos just stay black. I can see the thumbnail, but when I click on play, it just stays black.

Any plugins needed? I have flash and java installed, and totem:

https://projects.gnome.org/totem/ (it was preinstalled...)

 

Any known issues with firefox and the videos?

Using chrome with on first sight the same plugins installed, the videos work.

Are you using the online course or the old download course?

Yours in Fitness,

Coach Sommer

online, just bought it yesterday

Is your version of Firefox up to date? To my knowledge, the latest version is 22