The real joke is that we have a family friend called Bob, who is often called uncle Bob, and he's a photographer who covers events.
Case of the commercial I would instead refer to Uncle Bobs as "the guy with the big camera that wants us to think he's the photographer of the wedding when he isn't" or just a family member that wants to/agreed to take photos because he just has a nice camera.
But LOL, people fight over phones too much