Would you care to post the original as well? It doesn't look very steady to be honest. Anecdotally, i would think iphone's camera is already doing some stabilization because i have filmed from my car using apple's bundled camera app and the video looked impressively steady (but hey, i was in a car).

What is impressive about that movie ? To me it's quite the opposite.. it's not impressive at all (too dark, bad fps) and when I watch it there is something in it that causes head aches. It's very hard to watch.