Blog · How-to

Filming b-roll on a phone that cuts well

Shoot in 4K at 30fps if you have the storage, lock exposure and focus before each take, hold every shot for four to six seconds, and shoot vertically. Get forty clips in a session rather than four, because a thirty-second reel cutting on every second beat needs about thirty distinct shots and you will not have them.

The bottleneck in beat-matched editing is almost never the edit. It is that a thirty-second video at 120 BPM cutting on every second beat needs around thirty shots, and most people arrive with nine.

How much footage a reel actually eats

Video lengthCut densityShots needed
15s at 120 BPMEvery 2nd beat~15
30s at 120 BPMEvery 2nd beat~30
30s at 120 BPMEvery beat~60
30s at 140 BPMEvery 2nd beat~35

You can reuse shots — most edits do, and a repeated angle at a different point in the track is not noticeable. But an edit built from nine clips repeated four times each looks like an edit built from nine clips. Forty is the number that makes a folder feel deep, and forty is a two-hour session, not a week.

Settings, once

  • Vertical. Always. Horizontal footage cropped to 9:16 loses two thirds of the frame and every composition you thought you had.
  • 4K at 30fps if storage allows, 1080p at 30fps otherwise. 4K gives you room to reframe and punch in during the edit; it is the one real reason to shoot above delivery resolution.
  • 30fps, not 60, unless you specifically want slow motion. 60fps halves the bits per frame and buys smoothness nobody notices in a video that cuts every second.
  • Lock exposure and focus before each take — tap and hold on most phones. Autofocus hunting mid-shot is the single most common thing that makes a clip unusable.
  • Grid on. Free, and it fixes horizons.
  • Clean the lens. Genuinely. A smeared lens is the most common cause of soft footage and takes two seconds to rule out.

One setting to avoid: heavy in-camera filters or beauty modes. You want a neutral clip that takes a grade later, because the grade is applied across the whole video at once — colour grading short video explains why one look beats per-clip fiddling.

Four to six seconds a shot

Long enough to trim from both ends, short enough that a session produces volume. Roll for a beat before the action starts and a beat after it finishes — the first and last half-second of a handheld clip almost always contain a wobble as you start and stop.

Longer takes are not wasted, they are just harder to file. If you shoot a two-minute continuous take, split it into clips before it goes into a folder, or it sits there as one entry nobody reaches for.

The six shots to get every time

A usable session is not forty versions of one angle. It is six categories, each shot several ways, which is what lets an edit have variety without you thinking about variety during the edit.

ShotWhat it isWhere it lands in the edit
The wideThe whole scene, onceThe establishing beat, sparingly
The mediumThe subject, waist-up or equivalentThe workhorse
The closeDetail — hands, texture, a labelWhere the video feels expensive
The moveA slow push in, or a pan acrossBreaks up a run of static shots
The transitionSomething entering or leaving frameHides a cut between locations
The cutawayA hand closing a box, a light switching onThe shot every edit needs and nobody shoots

The last row is the one to internalise. Cutaways are boring to film and they are what makes an edit flow; the reason so many reels feel choppy is that every clip is a hero shot and there is nothing between them.

Movement, and how much

  • Slower than feels right. Phone footage exaggerates movement, and a pan that felt gentle looks frantic at 9:16.
  • Move your body, not your wrists. Step in, step across. Wrist movement is where the shake lives.
  • One movement per shot. A pan that becomes a tilt that becomes a push is three shots fighting in one clip and none of them cuts cleanly.
  • Static shots are fine. In a video that cuts every second, the cut is the movement — a whole edit of moving shots is exhausting to watch.

Light, in one paragraph

Shoot near a window with the light coming from the side, not behind the subject. Avoid overhead midday sun and avoid mixing daylight with warm indoor bulbs in one shot, because a grade applied to the whole video cannot fix two different colour temperatures at once. Dark footage is also the first thing platform compression destroys — why Instagram ruins your video quality — so err brighter than you think.

A two-hour session that fills a month

  1. Pick one location and one subject. Variety comes from angles, not from driving somewhere else.
  2. Work through the six shot types deliberately, several takes of each. Ten minutes per category is forty minutes.
  3. Shoot the boring cutaways while you are still there. You will not come back for them.
  4. Get twenty seconds of nothing — a wall, a texture, the sky. These become the breathing room between busy shots.
  5. Review on the phone before you leave. Anything soft, shaky or badly exposed gets reshot now rather than discovered on Monday.
  6. File into folders as you import — by subject, not by shoot date. A folder called "hands" gets used; a folder called "September 13" does not.

What to skip

  • A gimbal, at first. Useful eventually, unnecessary while you still have nine clips instead of forty. Volume beats stabilisation.
  • Cinematic mode and fake depth of field. It fails at the edges of moving subjects and the failure is obvious at phone size.
  • Log or flat profiles, unless you are genuinely going to grade each clip. A neutral standard profile takes a filter better than a flat one nobody corrected.
  • Shooting to a script. B-roll is raw material; deciding what each clip is for while filming is what produces nine clips.

The whole discipline reduces to one habit: shoot more than you need, of duller things than you expect, and sort it before you forget what it was. A deep folder makes every subsequent edit cheap, and cheap edits are the only kind that get made every week.

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