No need, since you haven't proven anything yourself.
That video shows someone looping the DCS Mi-8, which may or may not be doable IRL, but as A16 said, the structure may well be sturdy enough to withstand such abuse. As for the rest of his videos though, he's just doing some stupid crap, which again may, or may not, be doable IRL. But judging from what I saw, he's just stressing the airframe to its limits, which may well be survivable IRL too.
So no proof one way or another. The thing is, no-one takes the RL chopper this far, so there's nothing you can compare these virtual stunts with...
...but then again, you're obviously here just to troll anyway. So what does it matter?