There is no reason to believe that this is a fake, but it could be made quite easily, some of the YouTube trolls have a point there. Still, it is also true that the Grays, in particular, are identified with triangular formations like this. One of the best documented abduction cases, the Corrina Saebels case, began with a sighting of such a formation, and developed into a multiple-witness abduction with both parties completely conscious as it was initiated.
There is a terrific interview from 2008 with Corrina Saebels in the Dreamland archive. To learn more, click here.