Of course the vid was made deliberately and of course done next to a rattlesnake. How else could the video have been shot?? Other than the staging, what's your point? Does such manipulation in your mind mean such a scenario can never happen? It could happen. I take reststops all the time on hot summer days and unless 100% vigilant this could happen. His point in the vid is to look around the area before you sit. Point taken.
One time I was coming down the Big Fat Gap trail in Slickrock wilderness and stopped to clip a briar out of my face and heard a buzzing sound under my feet,but it sounded like a distant cicada and I kept working. Behold, below at me feet was Little Jimmy, relative to Big Jimmy.
The other point of the video is to sit calmly and not panic, although I myself would never touch the tail of such a snake and instead slowly slide my butt and body away from Sir PIT.