Seriously, though, I think it good that these videos are analysed in this way, however, the very first time I saw it I laughed very loudly. Forget when that type of plastic chair was manufactured. Forget how much surveillance systems and video recorders cost at that time.
LOOK at the, uh, figure. I thought it was a joke video until I realised that the very baggy man-monkey costume was being put forward as a genuine Sasquatch.
In a way it reminds me of Prof. R. V. Jones of British Scientific Intelligence who, at the height of the 1947/48 "Ghost Rocket" wave, received a copy of an analysis report on a piece of a "Ghost Rocket" -material was unknown but, Jones had examined the fragment. "Have you taken a close look at it?" he asked. The techs had not. They did so.
"Oh" was a simple reply because they were analysing a lump of coke. In this case not petroleum coke but coke a fuel with few impurities and a high carbon content and usually made from coal. It is the solid carbonaceous material which is derived from destructive distillation of low-ash, low-sulfur bituminous coal. Cokes made from coal are grey, hard, and porous.
In this video the question is: "Did you look at the man in the baggy monkey-suit?"