Here is the Patterson video. I believe this to be genuine. Key point to me is, if this is an ape suit, it is of a female.
Hard enough to make a fake suit, let alone add the difficulty of a realistic breast.
This was before Planet of the Apes.
To be sure if this was realistic breast motion as the creature walks, I had to do breast research on Pornhub. Tough work but someone's had to do it.