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EDITING & PACING BLOG / 8 MIN READ

How much b-roll should a video have?

Too little and your edit feels bare; too much and it turns into a stock-footage screensaver. Here is how much b-roll each format actually needs, and the only rule that survives every genre.

Score your pacing automatically Jump to the ratios
20–40%b-roll for explainers
50–70%for tutorials & demos
1.5–4sper insert
0–100craft score

By Thomas, founder of CutScore · Updated June 2026

PACING CHECK · explainer_v3.mp4
A timeline open on an editing monitor with b-roll inserts layered above a talking-head track, the moment an editor decides how much cutaway footage a video should carry.
CRAFT SCORE
FIXES ADVISED
b-roll coverage across the cut
B-roll share healthy · 34% of runtime✓
Insert too long · trim to 2.5s02:14
B-roll gap · 47s static talking head03:50
The 30-second answer How much b-roll a video should have depends on the format. A talking-head explainer is healthy at roughly 20 to 40 percent b-roll, enough to cover cuts and illustrate ideas without your face vanishing. A tutorial or product demo can run 50 to 70 percent, because the screen or the product is the actual subject. A vlog usually sits around 30 to 50 percent. Short-form needs visual change more than it needs b-roll specifically. The rule that survives every genre: add a cutaway wherever a static shot is about to lose the viewer, and nowhere else. If judging your own coverage is hard, that is one of the things CutScore measures in one pass.
WHY THE RATIO IS THE WRONG QUESTION FIRST

I have shipped videos with way too much b-roll. There was a phase where I thought a video looked "professional" if I never let a single talking-head shot breathe for more than four seconds. Every pause got a drone clip. Every sentence got a slow push-in on a coffee cup. It looked busy. It did not look good. People told me the edit was "a lot," which is the polite way of saying they had no idea what I was actually talking about.

Here is the thing nobody tells you about b-roll percentages. The number is a symptom, not the goal. B-roll exists to do a job: to show what you are describing, to cover an edit, to give the eye somewhere new to land before it gets bored. When you chase a ratio, you start adding clips that do none of those jobs. They just sit there, pretty and pointless, while your retention quietly drains.

So treat the percentages below as a sanity check, not a target. If your explainer is 5 percent b-roll, you probably have long stretches where nothing changes and the viewer drifts. If it is 80 percent, you have probably buried yourself under stock footage and the video forgot it had a host. Both are real failure modes. The ratios tell you which one you are closer to.

B-ROLL BY FORMAT

How much b-roll each kind of video actually needs.

These are working ranges, not laws. The right amount of b-roll shifts hard depending on whether your face, your screen, or your story is carrying the video.

FormatHealthy b-roll shareWhy that range
Talking-head explainer20–40%Your face is the anchor. B-roll covers cuts and shows what you describe, but the host should stay present.
Tutorial / how-to50–70%The screen, hands or product is the lesson. Cutaways are not garnish here, they are the content.
Product demo50–70%People want to see the thing working, in close-up, from angles a single locked shot can never give.
Vlog30–50%A walk-and-talk lives on environment shots. Too little and it feels like a static confession booth.
Documentary / story60–80%The interview is the spine; the footage is the body. Most of what holds attention is what you cut away to.
Short-form (Reels / Shorts)visual change > ratioOne or two relevant inserts per point beats a high count. Framing, captions and energy can carry a lot.
Podcast video10–25%People came for the conversation. A little b-roll on tangents helps; a lot turns it into a clip reel.
Read these as ranges, not quotasA great explainer can sit at 22 percent if every cutaway earns its place, and a weak one can hit 45 percent and still feel empty. The share is a smell test. What matters is whether each clip is doing a job, which is the next section.
STOP COUNTING CLIPS BY HAND

CutScore measures your b-roll share, your shot length and the gaps where the picture sits still too long, then tells you exactly where to cut. One pass, no scrubbing the timeline.

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THE ONLY RULE THAT TRAVELS

Add b-roll where the eye is about to leave.

Every cutaway should answer a question

Good b-roll lands the second the viewer thinks "wait, what does that look like?" You say "the new charger is tiny," and you cut to the charger sitting next to a coin. Question asked, question answered, attention held. Bad b-roll answers nothing. It is a slow-motion sunset over a sentence about spreadsheets. If you can describe what a clip is doing in one short phrase ("shows the size," "covers the jump," "sets the place"), keep it. If the best you can manage is "looked nice," cut it.

Use b-roll to hide your edits, not to fill silence

One of the oldest uses of a cutaway is covering a jump cut. You trim a fumbled sentence, the background jumps, and an insert over the seam makes the join invisible. That is b-roll doing real work. Filling silence is different. If you are dropping clips just because a shot has been on screen "too long," check the underlying pace first. The fix might be a tighter cut, not more footage. The clearest number for that is your average shot length: when it creeps up, you feel it as drag long before you can name it.

An editing desk with a clip selected on the timeline and reference shots open alongside it, the spot where a creator decides whether a cutaway earns its place or just fills time.
If you can name the job a clip does, keep it. If the best you have is "looked nice," cut it. Photo: Jakub Żerdzicki / Pexels.

Match the cut to the meaning, not the music

A common beginner move is cutting b-roll to the beat of the backing track. It feels rhythmic in the edit and lands as random in the watch. The picture should change when the idea changes, not when the snare hits. Cut on the word that introduces the next thing, so the image and the sentence arrive together. When that lines up, viewers stop noticing the edit at all, which is the whole point. If you want a deeper look at timing, see how long each shot should be.

Front-load coverage where you lose people

Most of your drop-off happens early, so your first stretch deserves the most attention, not the most filler. If your hook is a static face for fifteen seconds while you "set up the topic," you are paying for that with viewers. A single relevant cutaway in the opening that shows the payoff, or promises it, buys you the attention to keep going. More on that in how to make a strong video hook.

RATHER SEE IT THAN READ IT?

Here is a real CutScore coaching report for an everyday video: b-roll share, shot length, the static gaps, all scored, with timestamps and the exact cuts to make.

See a sample report
THE THREE B-ROLL MISTAKES

If your edit feels off, it is usually one of these.

Almost every "too much" or "too little" b-roll problem I see falls into one of three buckets. Fix the one that sounds like you.

1
EDITPACING
The bare patch: long static stretches with nothing to look at
A single talking-head shot holds for forty seconds and the eye gives up. This is the most common "too little b-roll" problem. You do not need wall-to-wall coverage, you need one or two relevant inserts to break the longest static runs.
How Find your longest single-shot stretches and ask what you could show instead of just saying. More on pacing.
2
EDITNARRATIVE
The mood board: b-roll that illustrates nothing
Every other shot is a stock clip with no link to the words underneath. The video looks "produced" and says nothing. This is the classic "too much b-roll" failure: motion without meaning. Cut any clip you cannot assign a job to.
How Watch with the audio off. If you cannot follow the point from the pictures, the b-roll is decorative, not useful.
3
QUICKRHYTHM
The strobe: inserts so short the eye never lands
Clips flash by in under a second, cut to the beat, and the viewer feels seasick instead of engaged. The footage might be great, but nobody can read it. Hold each insert long enough to register, usually around 1.5 to 4 seconds.
How Lengthen the shortest cutaways and cut on the meaning of the voiceover, not the music's tempo.
THREE WAYS TO CHECK YOUR COVERAGE

By eye, by stopwatch, or in one pass.

OPTION 01

Watch it cold, with the sound off

Free and surprisingly honest. Mute the video and watch the pictures alone. If you can roughly follow the story, your b-roll is doing its job. If it is a pretty slideshow that explains nothing, you have decoration, not coverage. Best done a day after the edit, when your memory of it has faded.

OPTION 02

Time the static stretches

Accurate but tedious. Scrub the timeline and note every run where the picture does not change for more than ten or fifteen seconds. Those are your bare patches. Then check no insert is shorter than your reading speed. It works, but you will be doing arithmetic instead of editing.

OPTION 03

Let a coach measure it in one pass

Hand the file (or a link) to CutScore. It computes your b-roll share, average shot length and the gaps where the picture sits still too long, against the right standard for your genre, and returns a 0 to 100 score with timestamps and fixes. See a sample report.

How CutScore reads your b-roll CutScore is an AI video quality coach for pre-publish QC. It measures the editing craft deterministically (b-roll share, average shot length, the longest static stretches, cut rhythm) and reserves AI for the genuinely subjective calls, like whether a cutaway actually illustrates the point. You get one score, the evidence behind it, and a prioritised list of fixes, before anyone else sees the video. It judges the craft of the edit itself, not your tags or thumbnail. More on the method and the standards.
Get your editing scored automatically See everything we check
KEEP READING
How long should a shot be Improve your video pacing How fast should I cut Average shot length A full sample report
QUESTIONS

Frequently asked.

It depends on the format. A talking-head explainer is healthy at roughly 20 to 40 percent b-roll: enough to cover edits and illustrate points, not so much that your face disappears. A tutorial or product demo can run 50 to 70 percent because the screen or the product is the story. A vlog usually sits around 30 to 50 percent. The honest rule is simpler: add b-roll wherever a static shot is about to lose the viewer, and nowhere else.
Yes, and it is more common than people think. When every other shot is a slow-motion stock clip with no connection to what is being said, the video stops feeling like a person and starts feeling like a mood board. B-roll should answer a question the viewer just had, not fill time. If you could remove a clip and lose nothing, it was too much.
Short-form needs visual change more than it needs b-roll specifically. A 30-second Reel or Short can survive on a single talking-head shot if the framing, captions and energy keep moving. But cutting to even one or two relevant inserts per major point helps retention, because the picture changing resets attention. Quality of the cut matters more than the count.
Long enough to read, short enough to keep moving. For most online video that means roughly 1.5 to 4 seconds per insert, matched to the pace of the voiceover underneath it. A shot that lingers past its point drags; a shot that flashes by before the eye lands feels like a mistake. Cut on the meaning, not the beat of the music.
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