Out There stories relating to "Airliner UFO"

This is a genuine unknown. The object appears very briefly, traveling at high speed. It is NOT the jet producing the contrail, but an object that flies from right to left across the window of the jet, between 14 and 15 seconds.

At 11 seconds in something that could be a large bird speeds past the wing of this landing plane. There appears to be a sound connected with it and passenger reaction. Is it a bird, though? The plane seems to react to it much more violently that one would expect, given no impact. So what was it. One thing is clear: it's unidentified.

This video shows an unusual cloud flashing past an airliner at altitude, moving extremely fast, then includes a clip of a similar object taped in China in 2008. Interesting, indeed. If UFOs are commonly cloaked to appear as clouds, they could be anywhere.