interesting....
Im not going to say 100% that i believe its an alien space craft, however i will believe that it is a UFO (Unidentified Flying Object)
Now, given that for a good part of the clip, there is no frame reference, it could be a still object that appears to move due to the camera itself moving.
However, that 'fact' appears to be null and void during the points where the streetlight is in view and the object appears to move.
At first, it seems to follow a pattern, moving in an almost regular and predictable path.
Was something like this apparent to you? seeing as you were standing in a still position (i'll assume sober)
once you consider with a rational and logical mind, the statistical probability of life existing elsewhere in the universe (very damn high, considering bacteria counts as life)
And then the statistics of some of that being intelligent life being a decent possibility.
There is a consideration though, given our current understanding of physics theory that nothing can travel faster than light, without resorting to folding space, which requires power estimated to be equivalent to harnessing a black hole, that if there is intelligent life elsewhere, the monumental task of traveling to another star would seem pointless if no effort was made to communicate with the dominant sentient species and instead focused on flying in drunken circles or probing cows.
Lets assume that they do exist, and they have come and 'communicated'
Its understandable why the forces in ultimate power would try to hide an event like that, the religious damage alone could be catastrophic, but the statistics and numbers involved in such a cover up would make it almost impossible anyway.
Another possible theory could be that its human tech, either advanced and not shared with the general public, or from a future point in time, however that itself has its own conundrum and conflicts in fact, so i wont go there.
Im going to suggest that you have one hell of a story, ok, it cant be proved, but it also cant be DISPROVED, and that is just as important.
I personally hope that it really is life from outside of our solar system, or perhaps we are not the dominant sentient species of our solar system.
To then consider a possibility like that, that there could be other sentient life within our own solar system (that expands out and past the Oort cloud, thats a HUGE area) its also then reasonable to conclude that they could have been there for a LOOOONG time, making it a lot easier to manipulate humans social and technological development resulting in control and cover up of any possible evidence.
Lets face it, if the dark ages hadn't happened, human kind would probably be exploring the stars now.
Google "2010 KQ"
an object that orbits in a position that it observes our little blue planet, highly probable that its artificial, likely that its a rocket booster stage, but if you'll also believe the nutbag conspirators its an alien probe observing us. can neither be proven nor denied.
"Any sufficiently advanced technology is indistinguishable from magic. Arthur C. Clarke"