I have the exactly same behaviou. On clicking on the progresssss bar video starts again, but again only for about 3 seconds.
Intrepid 64bit, nvidia graphics, firefox and konqueror
flashplugin-nonfree (libflashsupport installed and uninstalled)
nspluginwrapper is installed because its a dependency of flashplugin.
I have the exactly same behaviou. On clicking on the progresssss bar video starts again, but again only for about 3 seconds.
Intrepid 64bit, nvidia graphics, firefox and konqueror
flashplugin-nonfree (libflashsupport installed and uninstalled)
nspluginwrapper is installed because its a dependency of flashplugin.