Can someone please explain how in the world is it possible to own all this equipment?
Several of my personal friends have multiple 1D series bodies, a 300mm f2.8, 500mm f4, 800mm f5.6, 200-400/560mm f4, 70-200mm IS2, 24-105mm f4, and a dedicated macro lens as well as a Gitzo CF tripod and a Wimberley head. And also a 1.4 and a 2x teleconverter.
Easily over $50,000 of gear per photographer. This is basically the typical kit that a pro wildlife photographer will have.
Considering that, the gear that this guy in the video has doesn't seem to be far-fetched, by any means.