The American film industry (Holywood) was reaching hi-gear during the 1940s with new technologies and expanded venues to reach the viewing masses. Typical of those times, people of color regardless of talent or money, were excluded from the big profits. However, "Black" Hollywood did have some notable creativity that should be acknowledged.
If you are a fan of the old black and white movies, Son of Ingagi will give you great pleasure. If you are merely curious about the intrigues behind the movie, this is a movie sleuth's paradise; there are many skeletons in the closet of this film to expose and ponder.
The free version is of the movie is/was available on YouTube and other venues.
Happy Black History Month!