I also don't understand why the mind is relevant. We are trying to prove something that exists outside the mind right? However, even if this phenomena was something that only humans could observe, it would still be testable with science. Science makes observations about human behavior all the time.
Ok, all that said, almost none of this is relevant because my proof standards are not as rigorous as scientific standards. I just want to see some videos of the beings, I'm not asking someone to perform a study here.