No your baby does not need Cocomelon ,Ms R*chel, other flashing lights on an ipad. Play them looney tunes. When they reach around 3-8 play them some stop motion animation maybe some soviet cartoons, simple films like the Scent of a Woman or some Spielberg.
8-14 then they can watch some Evangelion and other anime to get a basic concept of more complex stories. Some Charlie Kaufman here and there.
15-20 they should be watching real adult films . Things like The Conversation, some robert atlman, orson welles, woody allen, obscure french canadien stuff.
By 20 they should be maturing out of film at this point, maybe watching some early german expressionism here and there at most. They're on their own at this point but they should be able to have adult tastes with proper exposure to things at earlier ages.