B-Roll
B-Roll is the acronym for Secondary Video Footage.

Secondary Video Footage
Not an actual acronym; this is a term used in film and video production referring to the secondary footage in cinematography. Originating from the days of film editing, A-roll refers to the primary footage featuring the main subject or action, while B-roll provides supplementary context, cutaways, and visuals that enhance the storytelling, add depth to the primary footage, or cover edits. It often includes shots of the environment, other subjects, or actions related to the main narrative, helping to create a more engaging and visually interesting piece.
- Abbreviation: B-Roll