He designs an engine system. He scraps gearbox and transmission and replaces it with generator and electric motors. At 1:04 he says he will just stick the generator at the back and worry only about producing the required power.
Right, he says you will need to have electric motors to at least assist (hybrid technology) with rapid acceleration. Apparently this engine is probably very efficient at a fixed speed/rpm, and doesn't provide the torque of an ICE.