All embeded Videos worked for years with your plugin. But now I get the message "jwplayer is not defined" in the firebug console with every video. Youtube-Videos works without any problems. You can check it here: ahdesign.de/leistungen/tutorials/item/459-test
There is only one line in this article:
{mp4}PDF-Vorlagen_in_OSG_Seminar_Manager_bearbeiten_720{/mp4}