This is a segment from one of the "package features" that Disney made during the war. Nobody really remembers them today, and I'm not sure if they're on DVD (well, I'm sure Song of the South isn't). They're nothing but short segments shoved together with live-action interstitial material in between. This one is from "Make Mine Music".
"The Three Caballeros" is by far the best one. Steal money from your grandma to see that movie, if you have to.