good stuff, weird running form though, it looks like he would get worn out really quickly.
ya over time i have developed something (i can't recall the term for it) where i roll from the outside of my foot inwards when i walk and run. it wasn't until after this video was filmed, which was about 2 or 3 months ago that i noticed this problem. since then i have been trying to straighten out my alignment by focusing on having my whole foot touch the ground evenly. walking barefoot has helped a lot and i am pretty much in proper alignment now. as for getting worn out quickly, that makes pretty much no sense. i was just running slightly out of alignment, which has almost nothing to do with endurance. what it can do is affect your knees, shins, back, etc. which is how i figured out that my running and walking form was off. i'm glad someone noticed this tho, having proper alignment is very important, especially with parkour.