The video from Fulford. I really hope its true, but tend to say fake, possibly gay.
Pros:
Possible if it was over ocean to have this be the only video.
Speed is correct. Spent a shitton of time looking out window. It tracks right.
Fulford seems legit, so I give it a second look.
Cons:
CIA source screams fake.
No airplane window haze or frame as it moves behind aircraft.
No chatter. If someone saw a fucking skyscraper sized UFO out the window, everyone would be going full retard.
Verdict:
Mixed bag. 60/40 fake, but great CGI.