I should mention one other wog-boggling thing I've encountered lately. I viewed a disc called "Treasures Of Black Cinema" which seemed to be some kind of TV series that crammed four "race films" from the 40's onto one disc. They were all various genres with different stars, a gangster movie starring Ralph Cooper, an old horror movie with Nina Mae McKinney and a Herb Jeffries western. They were all pretty cheap and rudimentary but still entertaining but the fourth one made my eyes bug out.
It was a comedy starring Mantan Moreland but instead of any of the all-black films he made, they showed an old Monogram film where he was paired with Frankie Darro as a comedy team. Moreland was the only black actor in this and he acquitted himself well. The kicker was one scene where Darro was in blackface adn doing a Negro accent! How the heck did something like that slip onto a "Black Cinema" series? Why didn't they just trot out the original Amos & Andy or the Two Black Crows? Sheesh! Richard Roundtree did the introductions for these films. I wonder if he had any idea what he was involved with.