Great movie. Yellow Submarine is one of the things that shaped me into the cartoon-loving oddball I am today. Surreal visuals, Beatles songs and Brit wit. A winning combination.
One of my favorite exchanges:
Old Fred: (as he and Ringo notice Frankenstein's monster) Frankenstein?
Ringo: Oh yeah, I used to go out with his sister.
Old Fred: His sister??
Ringo: Yeah. Phyllis.
It took me years to get that joke, but when I finally did, I laughed my butt off.
Some of my favorite visuals were for the Sea of Time ("When I'm 64"), the Sea of Science ("Only a Northern Song") and the Sea of Phrenology ("Lucy in the Sky with Diamonds").
Going back to the Frankenstein bit, one clever visual touch in the film that I liked was how each Beatle first manifested himself into movie via how they had always imagined themselves as or as what they personally aspired to be: Ringo Starr first appears as an ordinary bloke from Liverpool, as that's how he's always viewed himself. John Lennon first appears as Frankenstein's monster because he always thought of himself as a monster. George Harrison was starting to go into his spritual phase during this time, so he first appears atop a mountain as an Eastern-style guru. Paul McCartney first appears playing classical piano since he's always wanted to be a classical pianist.