Woa....my pulse was going a bit faster when watching
It looks like there was only one person on board. When the bird was in a stable hover you could see the CG was somewhat forward. This can only be with considerable tailwind if solo.
I was once in a situation when my left front passenger had a weight of near (or maybe over) the max seat weight (is it 240 lbs.?) and two not so light pax were in the back seat. The CG was so much forward that I had not too much aft cyclic travel left. When coming back for landing the person waiting on the ramp to unload the pax told me when I touched down with the front skids I must have been 1 1/2 ft. of the ground with the rear portion of the skids.
Maybe the pilot tried to lower the bird with cyclic input instead of slowly lowering the collective and the addition of a gust from the rear may have caused the pilot to over control believing he was going to dig the T/R in to the tarmac?
I am very curious about what you guys come up with.......