The human in this human-dog-cat triumvirate left a camera running one day after she left the apartment. Why? To catch her dog in the act. See, the dog is not allowed on the bed. And the dog isn't happy about that.
After the human walks out the door, the dog moseys past the bed, almost sulking as it notices the cat up there. It makes another pass, sees the cat on the bed again, and must think, "Hey, why not? How will my human ever know?"
And then the show begins as the dog hops on the bed and has a blast. Kitty just sits there enjoying the show.