Documentaries aim to document real events using actual footage or reconstructions. They can use a narrator's voiceover or rely on interviews with participants. There are several types of documentaries including fully narrated, fly on the wall, mixed, self-reflective, docu-drama, and docu-soap. Key features include observation, interviews, carefully composed shots, a sense of drama, and exposition to advance the argument. While using real footage, documentaries still involve a high level of construction through directing participants and organizing settings.