Blackface is a kind of costume or make up. Non-Black performers wear blackface so that they can represent racist images of a Black or Afrcan American person. Blackface became popular in the 19th century especially during Reconstruction after the American Civil War. It made racist stereotypes like the happy-go-lucky darky on a plantation more common.
Early in the 20th century, blackface came off the minstrel show. It became a form in its own right.
The videos for the Culture Club "Do You Really Want to Hurt Me" and Taco's "Puttin' On the Ritz" are videos in which actors in blackface appeared during the early 1980s. The original video for "Puttin' On the Ritz" (1983) was not allowed due to the characters in blackface in that video.