Expository documentaries expose a topic or person through a commentator explaining over pictures or video. They use rhetorical questions, facts, opinions, and persuasive techniques. The commentator directly addresses the audience on biographical, historical or event-focused stories, including exclusive footage and interviews. Channel 4 has produced over 450 expository documentaries covering topics like history, biographies, health, science, nature, the environment, and music.

1. Expository
Documentaries

2. Expository Documentaries
 Expository documentaries are documentaries that expose a person or a
topic.
 It is a classic form of documentary and one of the four main types.
 They are well known for having a commentator talking over the pictures
or videos and explaining the story.

3. Main conventions
 A commentator
 Rhetorical questions
 Facts
 Opinions
 Persuasive techniques

4. How they appeal to an audience
 In an expository documentary the commentator talks specifically to
the audience.
 They are often biographical, historical or talk about a certain event.
 They include footage, interviews or pictures exclusive to the
documentary.

5. Expository documentaries from Channel
4
 Channel 4 and More 4 have made 451 documentaries in total so
far.
 Some of these include topics such as; historical, biographical,
health, science, nature, environmental, music and more.