B-roll refers to supplementary footage used in a film or video production to enhance or provide context to the primary footage, known as A-roll. B-roll includes secondary shots such as background scenes, cutaways, or close-ups that help illustrate or enrich the main content. It is often used to cover edits, add visual interest, and provide additional information or atmosphere, supporting the narrative and making the final production more engaging and dynamic.

英語での「B-roll」の定義と意味

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