It looks like one of those wobbling Pleadian beamships that was captured by Billy Meirs many moons ago. I remember seeing this clip on TV, and although I've been out of that type of research for awhile, I find this (to my mind anyway) to be some kind of hoax. Anything THAT big and THAT awesome flying over a major city in broad daylight would cause PANIC.
And even though there have been many sightings going in and out of that large volcanic mountain outside of Mexico city, my second choice would be that this is an experimental aircraft from the test site in Nevada. Better to fly it over THEIR airspace than ours.......much safer in case it crashes (for denaibility), another country to record the psychological effects and print in their papers, and a bad ass way to introduce (perhaps) some kind of city surveillance craft.
(Coming soon to a neighbourhood near you).

My judgement on this one is let's wait.
I'll also ask around, and see what the final report was on this one.
I've gotten to the point that I could care less if anyone sees one, or even believes they exist.
If and when they decide to show themselves, they will.
Otherwise, it's like waiting for Santa Claus.

(Will they bring presents?)
;~