The short clip (at about 1 min 36 secs for anyone who isn't a B-52s fan) is one I've not seen before. The tank is serial 9164, a Mark V Composite (aka Hermaphrodite) that served with 5th Battalion in Germany. It is known to have been in Duesseldorf on 14 March 1921. It had previously belonged to 12th Battalion when that battalion was in Germany and at that time was numbered L7. It was originally issued, when it was a Male, to 4th Battalion on 17 June 1918 but was disabled on 10 August that year.