I just thought i would bring this to people`s attention.I found a very neat site which has some short tapes of various German tanks,noteably Panther, Tiger I and II,on some kind of testing area,maybe Aberdeen or ...? The tiger II Porsche turret footage is really good,and even shows it doing a pivot on its tracks.It shows how tough the transmission and tracks actually were,as this tank was 68 tons.This is the title:
http://www.worldwar2aces.com/ww2-footage.htm