This video has been making the rounds recently. It supposedly depicts an "alien," which was killed in Pakistan. The video is just someone holding their camera up to their computer screen, on which we see a picture of a large creature in the foreground, with some people in the background.
The first, most obvious thing about this picture is that it suffers from forced perspective. Forced perspective is what happens when you have a big discrepancy between the foreground and the background in a photo. Like when tourists take photos in which they appear to be holding up the Leaning Tower of Pisa.
The creature is clearly in the foreground, and presumably being hung up in the air. This makes it look a lot larger than it really is. This is a common characteristic of supposed "monster" pictures, and it is a good thing to learn how to spot.