I always viewed the Patterson footage with a skeptical eye. Never really thought much of it. That is until I watched a documentary on Discovery or History Channel where high resolution analysis was done on the film. It shows musles actually rippling in the legs, shoulders, and arms while whatever was walking, was walking. Also showed quite clearly that whatever it was possibly could have been female by the distinct breast shapes when it turned around.

I'm not about to claim to footage is genuine but the site you gave the link to seems a little below grade at best. Just take a look at the still photograph of the film on the mainpage.

If it was a guy in a monkey suit,....... he either had some massive calf muscles or Patterson and his buddy where able to construct one of the most elaborate costumes of their time.

No idea if the film has any merit whatsoever. Although I'm not arrogant enough to go shouting from the moutain tops that something is impossible. History has a way of consistently proving characters like that wrong.