I doubt the 757 in that video was exceeding VMO. The RNZAF operates it to airliner standards.
Ah....burst the bubble, why dontcha? (**)
I suppose though...that video is a great demonstration of how kinetic energy (AKA, airspeed to apply to an airplane's potential) can be translated into altitude gain....for a brief amount of time, and counter to the effects of gravity.
Therefore, it is reasonable for people to realize the opposite effect (in the sense that gravity is a contribution, whether as a force to slow you down when ascending, or speed you up when descending) that gravity can have on an airplane.