Videos like this one - chosen as an arbitrary representative of its type - have got me pondering.
I can't think of another phenomenon like this in human experience. Where two people can watch the same thing and one confidently asserts "hey theres something there!" while the other goes "what? no there isnt"
The closest I can think of is when people look at clouds and see shapes, but someone else looking at it doesnt see the shape. But of course nobody's actually asserting "that cloud is a dog" or even "that cloud was artificially made to look exactly like a dog"; they're just asserting "I see some resemblance to a dog"
The UAP phenomenon, wherein people claim to be seeing "something" in perfectly ordinary videos, appears to be a unique thing. I guess one could argue its part of the human pattern-seeking behavior; we see faces in wood grain or random patterns. But surely face detection has an obvious evolutionary reason while "I think that pixel is a space alien" doesnt.