This triangle UFO was captured as it raced across the deep sky. The videographer comments that it couldn't be birds because when using infrared equipment, as he is doing, flocks of birds flying at night can be mistaken for UFOs. But flocks of birds don't fly in rigid formations like this. It's difficult to be certain, of course, but the formation also appears to be very high.
Here's a good story just posted on the Huffington Post by Dreamland guest and Post Weird News editor Lee Spiegel: Triangle UFOs