Even the most ardent bigfoot proponent is often very critical of new media and claims related to bigfoot.
So what are the things that you consider to be dead giveaways that what you are looking at is a hoax?
For me, one of the things that causes me to immediately reject a video is if the subject is looking down at the ground when it walks, as if it can't see where it is putting its feet and has to be careful in doing so.
I don't usually look at the ground when I walk around in my natural environment, I can't think of any animals that habitually do so, and I don't see how a bigfoot could effectively live if it has to walk around with its head down. The only time I have really done this as a matter of course is when I have been wearing a chem-bio protective mask and overgarment (MOPP gear). When wearing a gas mask, you have limited peripheral vision, your hearing is impaired, and the boots are prone to get caught on tent pegs and other obstacles. Not to mention the heat load and greater effort to breathe while wearing the outfit. I believe the same would be true for a man in a bigfoot suit.
Realistically we are able to walk around with our heads up because our peripheral vision complements our gait, so we have a general sense of the area around us, and because we are naturally accustomed to the coordination, movement and balance of our own bodies. So when I see a video with a bigfoot walking along looking at the ground and stepping carefully, I conclude that the subject is a human in a suit. One unfamiliar with the environment in which it is walking, one whose tactile sense of the ground is inhibited by oversized footwear, or one whose peripheral vision is restricted by a headpiece making it necessary for them to look down to see where they are walking, and one who is unaccustomed to the change in coordination, movement and balance due to the suit. Add to that a level of discomfort due to heat load from the suit and impaired access to fresh air.
When a bigfoot moves or walks around it should do so with a natural degree of coordination and apparent comfort to be credible to me.