BOGUS!
Sorry, but as nice an idea as this is, the video is a CONCEPT not a product. Watch how the person stands while carrying the supposed enormous weights. The balance (center of gravity) is wrong unless the packs are very light. Additionally, there are too few servos to act torsionally on the legs. There is nothing to act on side to side motion of legs. Compare this with the Japanese versions and you can see that this device is powered by the human, not the motors/pistons. The very idea that the device supports weight even when batteries are depleted is ludicrous. That might help in a stiff-legged march down hill, but will not help once the knee is bent. Sorry, nice video, no credibility.