I agree with what you said. Interestingly, I recently saw what I think was a UFO. I was looking at the sky through binoculars for the first time, maybe in my whole life (there was a light high up in the sky that I’d noticed for ages each night when I walked my dog, so one night when we got back I hunted around for binoculars to finally satisfy my curiosity) and what I saw instead was some kind of sky vehicle whipping around in the air. I watched it move around the sky for about five minutes before it whizzed out of sight. I didn’t think of getting a camera couldn’t have taken a picture of it at that distance anyway.
So, who knows?
So why don’t you go back and try to take a picture of it or film it with a good camera if its always there?