The Video shows a demonstration model of a self balancing two wheel car. The "car" would be very, very much lighter than our current cars, and use much less fuel, with consequent reductions of energy, and therefore the production of green house gases.
The vehicle could run on electricity, or have a small petrol/gas motor. Indeed, the wheels themselves could be part of a large electric motor.
The video shows quite a small cabin in between the wheels - I would envision a larger cabin - as long as most of the weight is kept below the centre of gravity.
You will notice, of course, that the car rocks a little as it starts and stops. This can be minimized by having the motor platform separate from the main cabin, and they will tend to go in opposite swings. And/or a giro system could be employed.
The main aim is obviously to reduce gases going into the atmosphere by reducing weight. And these vehicles would cost very little to produce, and could be left in large cities for people to use freely instead of buses, trams and trains. For longer distances, they could be connected together magnetically with quick attach and release mechanisms and run on railway lines to transport commuters to and from work.