That film clearly indicates that Hanna hacked the Spit's OS.
It turned to tight, the roll rate was too fast, the Hispano's had too much range and hit too hard, climb in the vertical was far above what it should really be, the pilot was able to move his head around too much, the landing gear struts are way to soft and the underwing radiators are 3/4" farther forward than they were on actual wartime aircraft. Oh, yah, the paint isn't the correct shade of green.
Did I miss anything?

Nice flick, SW! Thx.