Did he hack his turbo-kenevo? Based on the 'burnout' shot and him riding uphill without pedaling I guess he's hacked the walk/push assist button on that bike into a throttle. Also assuming he got rid of the speed limiter given some of the speeds he was pedaling at. It's the first thing I would do since pedaling once you hit the speed limit/engine cutoff sucks big time.

The thing that worries me about e-bikes is how easy it is to modify them into something that should definitely not mix with real bicycles...

Haha thank you!