You can watch most of the classic bits (Zip a Dee Do Da and the Brer Rabbit vignettes) on
youtube.
I teach high school English in an inner city Atlanta school that's about 5 miles from the Wren's Nest (home of Joel Chandler Harris and the center for the preservation of the Uncle Remus stories and the African heritage they chronicle). I teach about Brer Rabbit every year when we study archetypes (hey - I even work in a connection between Brer Rabbit and Captain Jack as trickster archetypes).
That said, I would never show
Song of the South to my students. I do think there are some really racist and stereotypical portrayals in the live action parts of the film. Yes, it's history - but it's
ugly history - and it's not something I want candy-coated and Disney-ified when I present it to my own children or the students that I teach. That said - the cartoon Brer Rabbit stories are fabulous and really ought not be lost.