I watched that yesterday and I thought it was just a short film. I can't remember what this sort of thing is called...it's freestyle something....people find an artful way to move about through the city. There were 4 guys who did this sort of thing on many buildings all over London.
I wish I could remember the name for this sport.
edit: I think it's called Free Running...off to google.
Yup, it is. Started in France where it is called Parkour.
http://en.wikipedia.org/wiki/Parkour
The London think I was thinking about is called Jump London.
http://www.dvdtimes.co.uk/content.php?contentid=11935
edit no 2: It seems that it's from this French movie: Banlieue 13