Doorbell Cam is a creature made by Trevor Henderson.
The creature is a creature of unknown skin color (because of the camera). From what we can see, it appears to have no legs or hands, but keep in mind this is only what it appears to look like, so it may still have them. It’s eyes look black with white pupils, and it’s mouth appears to be connected to its nose. In a comment, it is saying to be let it in someone named David’s voice, who was sitting next to the person who was viewing the camera.