UFO spotted flying over the moon

A youtube user by the name of Crrow777 uploaded a video today which shows a very strange object fly past the moon. Although it does fly in a straight line over the moon which might make people think its a comet or something of that nature, but the video tracks it going past the moon and then zig-zagging back and forth. Now, I'm not an expert on these sort of videos so I'm hoping someone out there might be able to explain.

Video HERE

Very strange indeed, what do you think it is?