The video didn't work for me, but I'm assuming that the guy shot a lot.
It's one of those variable things between guys. Some shoot a lot, some don't. It can be dependent on how hydrated you are, but mostly it's just what is normal for you.
I've always had big loads - eight to ten big spurts that can travel five feet or more are normal for me (video in my gallery), but I know that some guys barely manage four shots.