Definition
What is B-roll?
B-roll is supplementary video footage used to support the primary footage, or A-roll. Editors cut to B-roll to illustrate what is being discussed, establish a place, add visual variety, cover an edit, or shape the pace and mood of a sequence.
In an interview, the speaker is usually the A-roll. Shots of their workspace, hands, product, neighborhood, or archival material can all become B-roll. In a product video, the demonstration may be primary footage while close-ups and lifestyle shots provide supporting coverage.
Good B-roll is specific rather than decorative. It should reveal information, reinforce the narration, or create an intentional emotional beat. Editors also use it to hide shortened dialogue, remove pauses, and connect sections without showing a visible jump in the main shot.
Example in the edit
A chef explains how a dish is prepared on camera. The edit cuts to close-ups of chopping, steam rising from a pan, and the finished plate while the chef’s voice continues.
Why editors use it
Planning enough B-roll gives an editor options. It makes explanations easier to follow, improves pacing, and can rescue edits that would otherwise contain distracting cuts.
Quick answers
Frequently asked questions about B-roll
What is the difference between A-roll and B-roll?
A-roll carries the main story, such as an interview, presenter, or central action. B-roll is supporting footage placed around or over that primary material.
Does B-roll need its own audio?
No. B-roll often appears under dialogue, narration, or music, but natural sound from the B-roll can be mixed in to make the scene feel more immediate.
How much B-roll should you shoot?
There is no fixed ratio. Capture enough wide, medium, and close detail shots to cover the important ideas and likely edits in the primary footage.