You can decide whether you find this offensive. It’s a clip from an old show called History Bites, which ran from 1998-2003. Here is a link to the show’s Wikipedia entry if you are interested in learning more about the program.
The Slave Hunter
Searching for Black Confederates: The Civil War’s Most Persistent Myth
“Levin’s study is the first of its kind to blueprint and then debunk the mythology of enslaved African Americans who allegedly served voluntarily in behalf of the Confederacy.”–Journal of Southern History