How to Generate B-Roll with AI

B-roll supports a main scene with supplementary visuals. Generative tools can create a short clip from a text prompt or animate a reference image, helping an editor fill a gap when a real shot is unavailable. A prompt is a starting point, not a guarantee: people, signs, object interactions, camera movement, and continuity may differ from what the editor intended. Define the role of the shot before prompting. Is it a mood-setting cutaway, a conceptual animation, or a recreation of a real event? For a visual meant to illustrate a fact, check that the generated details do not add false evidence. A generic network animation can explain an abstract idea; a realistic depiction of a named company’s server room could falsely imply an actual scene. Historical or news-adjacent recreations should be clearly labeled where viewers could mistake them for documentary footage. Prompt with the subject, action, setting, shot size, camera movement, mood, aspect ratio, and duration. Generate alternatives, inspect each frame for visual artifacts, and review the clip in the edit with adjacent shots. Check lighting, wardrobe, geography, and movement so the insert does not break continuity. If generating from an image, use material you have rights to use and follow the tool’s terms. Preserve project history and any required content credentials or labels. Use generated B-roll to supplement reporting or filming, not to impersonate evidence. For commercial or public use, verify likeness, trademark, copyright, disclosure, and platform requirements. Keep a record of what was generated and how it was edited. The final video should make clear what is real footage, what is illustrative, and whether viewers need that distinction to understand the story.