I love a good conspiracy theory, but usually they fizzle out within a few minutes of web searching about them. Want to get the other side? Just search for whatever it is plus “debunk.”
The Secret of Skinwalker Ranch on History, for example, doesn’t hold up very well. In the season two finale, they fly a helicopter around to take sensor readings. The radar altimeter starts alerting them that the ground is less than 50 feet below, when they were 1500 or more above it.
The helicopter pilot was (pretending to be?) mystified. It was as if there was something just below the aircraft that no one could see.
A quick search reveals tons of documentation on things that mess up radar based altimeters and give them false low readings.
I was really hoping for an invisible UFO flying around below them.
But, do your own research. Though, it may be a funner show if you don’t.