Overview
B-roll fails when it's selected to fill screen time rather than to illustrate the specific thing being said at that moment. Generic b-roll — a person typing, hands on a keyboard, a city skyline — used as a visual backdrop for a voiceover or interview covers the screen but communicates nothing. The viewer's attention goes to the audio because the visual offers no new information. B-roll that illustrates the specific word or idea being discussed at that moment adds a dimension — the viewer gets the audio information and visual confirmation simultaneously, which reinforces retention.
The B-Roll Strategy Framework identifies which moments in a video benefit from specific illustrative b-roll, builds the shot list that ensures coverage, and places b-roll at the structural points where it serves the narrative rather than decorates it.