I tried to watch this interview when it first aired a few weeks back. After 20 minutes of Thomas DiLorenzo babbling on about scholars who he characterizes as members of a "Church of Lincoln", along with other vague references to history and historians, I lost interest. I have a great deal of respect for Brian Lamb, but it would have been nice to see someone with a bit more insight into Civil War history and historiography challenge some of DiLorenzo's more outlandish claims. Lamb seems to be more interested in DiLorenzo's background than with what he has written.
Spend an Hour in DiLorenzo’s “Church of Lincoln”?
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