Here are the key points about different documentary genres: - Fly on the wall documentaries have no narration or interviews and observe subjects without their acknowledgement of the camera, pioneered by directors like T.A. Pennebaker. - Fully narrated documentaries use voiceovers to help audiences understand visuals and present information as objective truth. - Mixed documentaries combine interviews, observation, and narration from within the frame to advance an argument. - Self-reflexive documentaries acknowledge the camera and have subjects speak directly to filmmakers, drawing attention to the filmmaker's role in constructing reality. - Docusoaps combine elements of documentaries and soap