UFO is an unidentified flying object, it doesn't necessary mean it came from space (unidentified as in weather parachutes in the darkness, military planes etc etc...).
Or they might be alien planes that have been recovered since the roswell incident who knows.
The definition of object is:"a material thing that can be seen and touched.". It doesn't necessarily have to be anything related to aliens. As I've previously stated in this very thread, it could be a number of things, even someone flying out their drone. As long as it is flying and a person can't identify it, then it is classified as a UFO.
If you watch documentaries you will find many strange experiences with them.
But in documentaries have you noticed that it is low quality not even 420p
Yeah this is obviously a problem. I always wonder how people can't get access to cameras, or smartphones that record at least fHD in 2015. That's relatively easy. Anything under fHD is just bad for my eyes and can be more easily faked.