This thread is an example of why you dont see and hear more from test teams and why nobody releases video.
The video shows two autos, the first done in the type. From this, this group has focused on one aspect, the ground run, which was not optimized, because it did not have to be. I will bet nobody who has posted here has ever autorotated a 10 ton helo at max gross weight to the ground, and I will bet nobody here has seen any such auto done by any other such helo, but the thread moves on, regardless!
The auto capability of the typical large helo is about like the 92, in fact the 92 is probably better than most in its size range. It can be stopped and it can make a good auto entry to the water, but the test pilot on that day was just trying to land without harming a $100 million asset! Had he bent that machine, the program would have been set back by at least 6 months, and he would also have had visitors while in the hospital. He did a great job, and you got a peek into the test world. Deal with it!