Dear Armin,
I think after I installed the carousel update I can not play html5 videos on firefox (though sometimes some videos work sometimes). On Internet Explorer it works. Before that update or maybe it was the last Laytheme update everything worked fine.
Do you have an idea?
A link on my page with videos (below):
http://www.schroeder-andreas.com/denn-da-ist-keine-stelle-die-mich-nicht-sieht
Thanks alot!
Andreas