Nice. I've shot some video with mine while riding my miniPro but that was hand held rather than mounted - I would expect too much jarring in the vertical plane if actually attached - has that been a problem? Perhaps with a 'real' segway the extra weight of the vehicle means that vertical movement is more damped.
An alternative Segway experience I recorded months ago and didn't put online at the time. This is the much smaller miniPro model, and I'm hand-holding the Pocket.