You might not be aware that I have seen your demand before. Your demand boils down to an impossibility. That impossibility is, " show me visual proof that something is not visual!" Which is both hysterical and impossible. The only way for someone to see that nothing is visual that is making a nearby noise, is to be present in the flesh at the site. The internet is not a site, therefore the proof cannot be provided on the internet. I have described the equipment for you to buy and how to use it, but you will do neither because in the final analysis, you cannot psychological deal with an invisible Bigfoot, which is a common phobia of newbies. And you are too lazy to proceed beyond typing on the internet. Now it's your turn. Provide proof that the Bigfoot are not just flesh and blood in your video, but prove that they are flesh and blood all of the time, day in and day out, year round. In no way am I attacking you. I am very curious as to what makes you think that Sasquatch have an ability to always be flesh and blood, when scientists admit that higher dimensions do exist. Try buying (oh dear) the book X3 by Adrian Dvir, and read it cover to cover. Deep in that book, you will find out the intricacies of invisibility. There are also a handful of books that preach that the Bigfoot are invisible. Buy (oh dear) one of those and read it. And when you speak to a Bigfoot, now write this down, they don't speak back. Or at least, not to me. When you are out in the woods and in search of the Bigfoot, and whispering quietly to your like minded buddies, the BIGFOOT ARE LISTENING TO EVERY WHISPER BECAUSE THEY ARE ALSO HIGHLY TELEPATHIC. So your greatest plans have been foiled by you simply talking about them in the field. If you want to set up a camera that they somehow can't hear the very high frequency sounds, you have to have it encased in plastic like a go-pro, and underwater plastic protector or it must be inside of a car and shooting out of a window. But while you are setting the camera up and turning it on, you have to be thinking of something else like baseball, apple pie or how Trump is screwing up the U.S. beyond all recognition. But in the final analysis, you won't do any of this because all Bigfoot researchers are lazy and they are especially lazy when it comes to exploring proof of a type of existence that they simply cannot deal with.
I did not record it. I have recorded a conversation between myself and world famous author Robert Michael Pyle, where we we sitting in the woods near his home and the little paranormal forest person that I brought along with me, made some familiar sniffling into the microphone and then did some soft monkey hoots, that we did not clearly hear at the time but were apparent upon listening to the recording. I warned Robert about the sniffler before we started, and the sniffler did not disappoint. I travelled a hundred miles to get to Robert's house, and had no passengers in my car. Which means that the sniffler is paranormal in my world. The inexperienced disbeliever will have an endless list of inadequate reasons to explain it, however.