Is UFO UFO final Definition at youtube true or not?

I was hoping the additional details would yield a little more insight about what you're talking about. UFO means unidentified flying object. What else do you require? What does youtube have to do with it?

A UFO is an object, sometimes a rainbow, sometimes a bird, sometimes a cloud, a tree, a plane, a star, a planet, a sundog, etc, etc, that is misidentified as "unknown" due to lack of data or lack of experience of the observer.

I have no !%@$# idea what your question is about. Hope my definition helped.

PS aliens aren't real, therefore UFOs are never alien spacecraft.