Well consider the descriptions given on this thread. How much do these things weigh? Do they use energy without heat? Do they stop suddenly without killing the beings inside? No exhaust? No sound? Never collide with anything? Does that little check engine light ever stay on?
You remind me of all the talk back in the 80’s about the magic gasoline engine which got 100 mpg. The car companies bought up the patents and destroyed the technology to protect their evil profits. They had invented a way to cause one gallon of gasoline to have three gallons worth of energy in it!
How efficient is this alien craft? It can use all the energy for instantaneous motive power with no noise, and no heat loss, no friction, no air drag on the hull? Create no wind nor make a sonic boom? What fuel? Where do they fill up? What is their range?
BTW, here is my big question regarding alien abductions, “Why are they so interested in examining the human colon and reproductive system??!? They have this wonderful technology but cannot understand how we produce solid waste? How do they know who the kookoos are so as to abduct them? Obviously if they abducted a scientist or an Action 8 news team, the jig would be up, so they can only abduct nutcases. We would never believe them. Perhaps they know that the nutjobs all have colon problems and they are studying mental illness. Yeah that’s the ticket.
Your asking questions nobody here can answer. All I’ve done is give my opinion of what these objects most likely are. But in the infrared video you can see some kind of aura around them, maybe its heat maybe its not.