you might as well link to the youtube page, that WSHH player sucks
I saw it on reddit and went around looking for expert opinions on it and the consensus seems to be that what he does on the video isn't much proof of anything, Gorilla Glass would have performed just as well
to get a real test on it you would have to place it over sand or concrete and throw the glass with full phone weight on a surface, only them would it tell you whether its better than Gorilla Glass or not
also it seems its just sapphire laminate rather than pure Sapphire which is why its hardness is questioned(Sapphire is the second hardest natural substance after diamond)
Sapphire is used on high end watches as well as camera lenses because of its durability and clarity