A runs are north direction and B runs south direction. So you need to calculate ((a+b) /2)*0,96 to correct tire size error= result.
Units are kwh
Wind ruins the measurement accuracy fast so try to choose day when its calm. On that video it was too windy on that morning when I did those measurements on the video.
That best pressure is valid only for this car and those tires. With summer tires best pressure migth be differend.
Route is about 5.5km hilly route.
Here you can see the route.