While Agnes Varda was in California shooting "Uncle Yanco", she made this short documentary about a rally to free Huey Newton after he had been jailed, as the documentary tells us, a shoot-out with the police that ended with ten people injured and one cop dead.
Mme. Varda shoots and edits this as an anthropological study, with only Back people speaking; indeed, you have to look carefully to spot a Caucasian in the background. Having grown up in this era, I note that it's a useful corrective to the usual coverage of events like this, in which one heard White people talking about the racial divide and how to deal with it.