The film starts as a bootleg filmed-in-the-theater copy of some crappy Hollywood by-the-numbers movie like The Hangover. Maybe it starts in the middle of the film. I don't know.
After a few minutes of watching the film, occasional handshakes reminding you that this is a filmed copy, a person gets up & walks out. His silhouette is clearly outlined.
A few minutes later another person walks out. Then within another 30 seconds a third one does. Then a whole handful of people get up & their silhouettes become a kind of mishmash at the bottom of the screen. Then a giraffe silhouette rises above them. Then a male elk with huge antlers.
All manner of easily recognized animal silhouettes rise up. Then some kind of monstrous silhouette rises slowly, as a hunting snake would. It lunges & grabs the silhouette of a human, clearly eating it as the human silhouette struggles.
Another monster rises up. It is a rout. They are eating so many human silhouettes that it's really just terrible. All the while The Hangover has continued to play behind them. I think there has been no sound of human screams or anything like that.
There is a blur in the silhouettes & one of the monster silhouettes has been hit by some kind of projectile. A jet silhouette goes by, followed by a series of helicopter silhouettes. The second monster lunges & brings down one of the helicopter silhouettes.
A pitched battle ensues. The military silhouettes eventually defeat the monster silhouette. They fall to their deaths. Then The Hangover continues. Right as the credits start, the camera cuts out, like in bootlegs videos.