While "chester"'s review was kind-hearted, I felt, as someone who has viewed "Willie the Whale" numerous times, I had to expand on it. While he feels this movie has no other motive than to entertain, I feel it makes the most of the human experience.
Nelson Eddy does an inexplicably emotive narrative and also sings ALL of the songs. His inflection on the narration of this story could be the only reason to watch it. But, no, we also have a trained American opera singer (Eddy, again) singing all of the songs, without fault. If you closed your eyes and listened to this video, your emotions would still be evoked to the highest possible level, stimulated by music and narrative.
The story is so bittersweet. Although this is an old Disney production, I was not introduced to it until my daughter picked it up at a video store in the 90's. It has, at the core, a burning political statement, all the while, making it simple enough for the smallest children to relate to and to reconcile. All creatures are different; all have their own talents; we don't have precidence over anything we just don't understand; and we all make mistakes.
I cannot get through this video without tears at the end. It is simple and complex. Kids could relate it to the playground; we can relate it to world politics.
I've said all of this without mentioning a note that Nelson Eddy sings. There are some universal reknowned songs intertwined into this video, and if you know the background of them, "Shortnin' Bread", "Figaro", et. al., then you will get the underlying message. I think Disney and other production companies are very clever at using this type of medium to send a bigger message. If you really listen, you will hear, but if you don't want to, then you will still enjoy this gem of a short. It's a very sweet story.