the P38's engines in the video were 'handed' the wrong way for asymmetric flight
All for good reason
Fareastdriver, would you expect the famed Kelly Johnson the designer (SR-71) to do anything else?
The prototype had the props rotating in the opposite direction to the production aircraft shown in the video. Wind tunnel work that followed showed it to be the very worse direction of rotation, as the trim change with variations of power were at a maximum. So it was changed to the direction as in the video, the aim of reducing the pitching moment with power changes was to make the aircraft a more stable gun platform.