Doggo's flexing

A black dog runs across a carpeted living room, passing a white fan and a person lying on a couch, then turns and runs back toward the left side of the frame. The dog moves from the left side of the room to the right, then turns and runs back toward the left, passing in front of a couch where a person is lying. The setting is a dimly lit living room with furniture, a fan, and a window with curtains.