A person would be hard-pressed to argue that the Beatles didn't revolutionize music; even the youngest of today's kids has heard a song by or inspired by the band. (My six-year-old, for her part, is a fan of the movie Across the Universe
and her Kindergarten class performed "Yellow Submarine" at last year's graduation.) But people may not realize that John, Paul, George and Ringo also had a part in bringing animation to the foreground of innovation with the making of their feature-length film, Yellow Submarine.
More than a decade before Pixar, the film was not only a technical feat of animation execution but also a seminal work in bringing more attention to animation as a serious art form, both for audiences and for creators.
It's worth watching even if you're not a Beatles fan for the history and great one-offs from the narrator, who calls Yellow Submarine
"a sort of open-end Rorschach filled with Joycean puns." Check out the documentary on Brain Pickings. Link