I thought the same thing after watching both videos--this guy is a storytelling genius. Watching his videos, you feel a weird mix of jealousy and admiration, where you're jealous he gets to travel the world and film his experiences, but you credit him for being able to leave you feeling slightly enlightened after a few minutes. I'm getting the sense he does a lot of branded or endorsed work, but at the same time, he doesn't let it get in the way of his storytelling (watch the Nike video below).
I'll probably watch Casey and his brother's HBO show The Niestat Brothers sometime soon i.e. after the Olympics, to get a sense of his other work.
If you have a few minutes and want to see why "video storytelling" is the best thing, if not the next best thing, watch the videos below: