From the evidence contained within the video (and only from that) I can draw no conclusion other than it is a horrendous design fault with the aircraft - IMHO there is no evidence of pilot error at all here. (please feel free to disagree!)
Sorry DtA, but I have to disagree. With throttles reduction to idle at 50ft and airspeed decreasing almost 20kt prior to flare a very hard landing was definitely unavoidable. Night landing, poor visibility, MLW, low speed, high sink rate and attitude, crosswind and crab angle are a sequence that can lead to unforeseen results for any heavy jet airplane... Therefore, it's not an 'exclusive' MD11 design fault.