[jiggawatts]

Many of those videos with "eyewitness" corroboration have to be taken in context.

For example, the video clips typically show a small blurry splotch a few pixels in size. What's not always obvious is what level of magnification is used. In many cases its a digital zoom on top of a telephoto lens. The unaided human eye would see just a tiny speck, which could be anything, and may not even be the same "object"!

The other context is pilots rarely fly in empty skies, especially military aviators. Many "sightings" have been in the context of drills, war games, or similar. The pilots may not be aware of things such as small drones used by officers for monitoring, or secret testing of UAVs. E.g.: A question that designers would like to answer is: "Can this stealth drone be spotted in realistic scenarios by pilots not told about its presence?"

Etc...