The two big wheels, and what look like a belt make me think it is a variable diameter pulley belt drive like in a snowmobile. It has been used in motorcycles too. There is too much energy loss to be practical on a bicycle. It's an automatic shiftless bike.
The new, heavier, more expensive, less efficient, Landrider. !!!!
I don't even want to think about the weight and the cost.
The chain wins every time.
Don't get the belt wet, it may slip.
Don't reach down for a bottle and get your fingers in the spinning wheels!