It's Black Entertainment (2002), 6 {nm}

Survey of musical performers on film from the 20th century, organized into segments: Dancers, Divas, Rock and Soul, Jazz and Swing, Male Singers, and Hip Hop.
Documentary, Music | TV Special 8 February 2002
Director: Stan Lathan
Stars: Debbie Allen, Carl Anderson, Louis Armstrong, ...

https://www.imdb.com/title/tt0237343/

If you're feeling deja vu, it might be from That's Black Entertainment (2002), 7 {nm}. But that covered only race films from the 20s-40s. This covers only musical performers on film for 1929-1995. So this bites off both more (decades) and less (specific genre).

It offers about the same amount of time in the primary video, but without ANY supplementary video. No raw interviews, no public domain films, just a little text bio of some of the interviewees.

Although they included clips from rare short films, many titles were unidentified.

I spent a lot of time going through the program a second time, correlating it with the Connections page to see what other video titles I could find. I was able to add 9 titles, and annotated the other 39 to specify which star was illustrated by the clip. So going to that page now gives a good overview of who is covered by the program in chronological order. (The cast list also specifies most of the subjects, but the names are blended with interviewees in alpha order. And some are missing, like Bill Robinson. But new IMDb rules prevent us from contributing "archive footage" cast now.)

The best moment was seeing a new (to me) clip of Bill Robinson from the short By an Old Southern River (1942), and it was interesting to hear Gregory Hines say that BR was an angry man, despite his dancing being so light and joyous.

indie, dir. Lathan; 6