I have managed to locate 3 old (?) short videos of #013 revving (notice in movie #1 the signature of Gordon Murray on the rear brake balance foil)
movie #1
movie #2
movie #3
They are actually part of a longer video from Japan that I found a while ago but can't place my hands on at the mo

but to be honest these are the best F1 bits of it
TURN UP THE VOLUME!