B-roll

Supplementary footage layered over the A-roll.

B-roll is the visual reinforcement that keeps the viewer engaged during A-roll narration.

Well-cut B-roll is a documented retention amplifier — it reduces talking-head fatigue.

Modern long-form averages 30–60 percent B-roll coverage, depending on niche.

Why it matters

B-roll is one of the highest-ROI editing investments. Channels that under-index on B-roll consistently underperform on AVD.

Apply it

Paste any YouTube, Shorts or TikTok link and our analyzer will surface the metric, the curve, and the move that lifts it next.

The rhythm and tempo of on-camera or voiceover narration.

A short, sharp rise on the retention curve that indicates re-watch or rewind behavior.

The average number of seconds a viewer spends inside a video before leaving.

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