Taking a break from their usual topic of telling teenagers how to behave in as boring manner as possible, Coronet Films tell their unwilling audience about how the plantations used to operate in pre-Civil War times, and how they operate in the 1950s.
Much the same, it turns out, although there were changes even then, caused mostly by better transportation and mechanization of farming. But class structures remain in place, with poor Black tenant farmers taking the place of slaves, and the Whites still gather, behave courteously, while served by Blacks.
The description of this short on the IMDb calls this short "Eurocentric." Europe is never mentioned, and I suspect the reason it's called that is to imply that it's a bunch of furriners saying that, instead of Yankees.