Arizona Bigfoot Footage

The animal seen in this small piece of footage is rumored to be Bigfoot. The video is blurry and all you see is a small shot of the animals face. Why does all the Bigfoot footage turn out like this? There is never any clear footage, but we are led to believe that this is the long awaited confirmation of Bigfoot’s existence. How do we know that this footage is not a gorilla at a zoo? Maybe we just outed this footage for what it really is.