A-roll is the video/audio that tells the story, it serves as the narrative driver for a documentary. It is usually in the form of an interview. B-roll provides support and enhances the story by providing visuals that go along with the story. It is vital to get B-roll as it is also used to hide jump-cuts within the A-roll. If the soundbite of an A-roll goes on too long, it can also be used to keep the viewer engaged with the topic. It can be used to show the exact topic of what an interviewee is talking about to provide additional support. Lastly, B-roll can be used as a buffer in-between topics to give a break within the documentary.
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