While the cam obviously complicated his problems, you could clearly see him stall out his chute and lose control going into a flat spin. I doubt he would have recovered either way. The helmet cam just gives another angle to view his stupidily risky stunt. And a slightly less entertaining one since the other camera gives a perfect view of his panicked expression.
My buddies and I have 4 GoPros and we use them on our lacrosse helmets and on our cars and Bikes and we have never had a huge problem with them. The dude clearly made a user error and is very very lucky he had a second chute.