There have been videos made like this on every Far cry since Far Cry 2. Details like being able to destroy small trees with bullets, realistic fire spreading, realistic foliage physics, etc. were all toned back considerably in Far Cry 3 to allow for better graphics, and Ubisoft has never brought them back. Maybe next gen, alot of that stuff like physics is heavily CPU dependent and the current consoles have pathetic CPU's, maybe we'll get them back next gen once the consoles have Zen CPU's.
I hope that devs start putting more focus on physics and AI next gen, because I don't want another ride of slightly prettier scenes (while other scenes are toned down visually, because not all devs make every single piece looking pretty) and dumb AI, while lacking any physics.