He says in that video that they opened up the doors to show them that model, so it's unclear it's the same one "driven" for the demo.

Even if it is, they show interior, wheels & a distance shot of the rear opening showing a large air tank - very little can be seen of the actual chassis or engine.

Whatever tricks were done for the demo - whether the car is real or fake - it's highly unlikely what was shown today will ever be like-for-like accessible to consumers in the production model.