Tex Avery in his MGM days was at his best. His cartoons never took themselves too seriously. All they were meant to do is make us laugh, nothing more.
Naturally, this cartoon is loosely based on "Uncle Tom's Cabin" with Uncle Tom telling the "real story" of Uncle Tom's Cabin.
Uncle is about to lose his "little cabin" (smack dab in the middle of a big city no less!) to the evil Simon LeGree. So he calls his friend "Little Nell", a beautiful southern belle, to help him. They come up with the idea of making the cabin into a night club to raise money to pay the mortgage. Of course Simon tries to steal the money, until he sees the beautiful Nell!
The reason you will never see this cartoon today on t.v. because it is not 'politically correct' because the way that Uncle Tom is portrayed, which was typical of the day. There are also sexual overtones that some people today might find offensive. The suggestive sexual overtones were a Tex Avery hallmark, remember Red Hot Riding Hood? Tex felt that Disney had the kid audience locked up, so he went after the teen agers, and young adults. Ironically, the little kids saw his cartoons and laughed just as hard as everybody else, not having a clue on what some of the gags were about.
If you like Tex Avery cartoons, and have yet to see this one, keep looking, it's worth it!