These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Yellow Submarine
And the Beatles Rejoiced: The Beatles themselves did not want to take part in the movie at first, partially because they didn't like the idea of making a kiddie cartoon (that a lot of the people involved also worked on the cheesy Beatles TV cartoon didn't help) but also because it was an obligation to complete their contract with United Artists; as such, they didn't do their own voiceovers and simply gave them the rights to a couple of popular Beatles songs for inclusion in the film. After getting a taste of the psychedelic visuals, however, not only did they change their minds and appear in the finale but they also compiled several new tracks for the film.
Heartwarming Moment: Arguably when Old Fred reunites with the Lord Mayor with a hug when the Beatles free him with a song.
Periphery Demographic: The movie was intended for a teenaged/adult audience, but has seen glorious success as a trippy way to introduce kids to The Beatles' music.
Vindicated by History: The film was initially a flop and killed the non-Disney feature animation market for years. Animator Richard Williams, a fan of the film, claimed that the jerky, start-stop animation was to blame—it must have been, since The Beatles were at the height of their popularity by this point! That said, it has gained a Cult Classic following over the years.
What Do You Mean, It Wasn't Made on Drugs?: In his book Up Periscope Yellow, Al Brodax, the man behind the production, who wrote or co-wrote most of the non-musical sequences, swears the only time he ever had drugs was in a meeting with John Lennon after he'd finished the script.
In the behind-the-scenes portions of the DVD, it's revealed that while the animators never did drugs, they would often return to work a little drunk after having a few too many pints during their lunch break.
