Don't fret. It's a scam and a very transparent one. Every video shows the car slowly decelerating; especially the so-called "90 mpg" section. His right foot is nowhere near the pedal. With any pressure applied to the accelerator the consumption figure dropped like a stone as you'd expect. On the other hand, anyone with the balls to claim zero friction and post videos that prove beyond a shadow of a doubt that they're pulling a con-trick deserves anything he can get.