Very impressive.

No it isn't.
It's a small paper box with paper-folded valves that make an engine sound when an exterior energy source is applied.

Yeah but could you imagine if this thing was filled up with weed? Light that thing up and full throttle, baby!

Make a smokable version of this V8 and THAT would be impressive.

Upon closer inspection, this thing is much more impressive than just a paper box with folded valves that make sounds: https://www.youtube.com/watch?v=Pf3jnP6AbM0

a real engine just an air pump. The combustion is what gives the air the force needed to move the cylinder.

This is the same thing, but because it's paper it only needs a bit of forced air, so if you were a mouse, you could put this in your tiny mouse car and work a little pump to drive around....

very impressive!

I think my point was missed here.
It is impressive - no argument there.
But it's not an engine, and couldn't run anything. It's powered by an outside source. It doesn't create energy, it's the recipient of energy. I suppose if you want to credit it as a motor, you could credit it the same as an electronic motor, which uses outside energy, but not as a V8 engine which generates it's own energy.

Energy is neither created nor destroyed. A V8 converts gasoline into CO2, water and heat which increases pressure within a cylinder and in turn propels a piston that moves the car. This uses air to move a piston (and could be used to move a car). Gas = air in this example.