There is no claim of perpetual motion anywhere in the video by any of its participants.
No, there is no claim of perpetual motion, but the claim is that the vehicle can travel downwind faster than the wind.
The proposed action appears to be perpetual motion, especially the treadmill model built by Xyla that was the only basis on the Professor paying off the bet. In that model, the vehicle is held on a treadmill, the treadmill spins up the rear wheels which spins up the propeller, and the propeller pushes the vehicle forward on the treadmill, which in turn spins the propeller even faster, causing the vehicle to move forward faster than the treadmill is moving backwards.
The way the full scale vehicle is claimed to work is that the wind blows the vehicle forward. This forward motion turns the propeller via a chain attached to the rear wheel's axle. The propeller moves the vehicle forward faster, which in turn rotates the rear wheels faster, which turns the propeller faster, which moves the vehicle faster, etc.
Does that not sound like perpetual motion?