What is B-roll?
B-roll is the secondary footage you cut over your main shot to show what's being talked about. Here's what it is and how to use it well in short clips.
5 minute read
The short definition
B-roll is supplementary footage layered over your main video — the 'A-roll' — to illustrate or reinforce what's being said. If a speaker mentions a product, a clip of that product is B-roll. It cuts away from the talking head to keep the visuals moving and show, rather than just tell.
Why B-roll matters
On short-form especially, a static talking head loses attention. B-roll adds visual variety, illustrates the point, and hides cuts — when you trim a sentence out, a B-roll cutaway covers the jump so the edit feels seamless. It's one of the simplest ways to make a clip feel produced rather than raw.
Where B-roll comes from
Traditionally you shoot or source it separately — stock clips, screen recordings, product shots. AI tools can now suggest and insert relevant B-roll automatically based on what's being said, which removes the biggest barrier: finding the right clip at the right moment.
How to use it well
Keep B-roll relevant and brief — a cutaway should support the words, not distract from them. Return to the speaker for emphasis. Don't paper over the whole clip with stock footage; the face and voice are usually what carry a short-form clip.
FAQ
What is B-roll?
Supplementary footage cut over your main video to illustrate what's being said — like a product shot over a speaker mentioning that product. The main footage is called A-roll.
Why is B-roll important?
It adds visual variety, illustrates points, and hides cuts so edits feel seamless — which keeps attention, especially in short-form.
Can AI add B-roll automatically?
Yes. Tools like FrameOS can suggest and insert relevant B-roll based on the transcript, so you don't have to source each clip by hand.
What's the difference between A-roll and B-roll?
A-roll is your primary footage (usually the speaker); B-roll is the secondary footage cut over it to illustrate or cover edits.
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