Even with 380HP a side, that plane should not Vmc roll that quickly after rotation with a proper takeoff speed. As was alluded to above, possibly he was slow at liftoff due to a short field? Also it looks like the plane pitches up right before roll, maybe the pilot inadvertently pulled back while reacting to the engine out and that was just enough speed reduction to reach Vmc? Another possibility is he hit the wrong rudder? Ultimately no matter what the cause, it appears this was a worst case scenario for the pilot to deal with. Tragic video to watch, RIP.