I recall a TV show years ago that covered this sort of thing. One part I still clearly recall was video of a white light “dancing” in the sky a few miles away for a minute or two before quickly dropping out of sight (behind a mountain range I think). The typical claims of alien crafts were made along with “no man made aircraft could do this” etc.
A researcher was able to quickly debunk if all by pointing out that the people who made the video were in a straight line with an airport runway on the other side of the mountain. They were seeing the headlights of airplanes as they turned onto final landing approach. From directly lined up in front of the runway you would see the headlight appear almost motionless, with a little wobbling, as the aircraft lines up and approaches the runway. Then the light would quickly drop as the airplane descended to land. “No man made aircraft could do this” indeed… Most people just never watch them from that angle.