I have been messing with this in KDE bugs... alas, I can't see the code error ) it used to work OK in < 3.5.1
But anyway, here's how to sort it.
Load the google video, hit F9 (history), hit F9 (toggle off history)... and video will work fine :-)
Nick
http://bugs.kde.org/show_bug.cgi?id=125076