Reference Glossary
B-roll footage
B-roll footage is supplementary or cutaway shots — establishing views, close-ups, background action — recorded to intercut with a main interview or narrative (A-roll) for context and edit coverage.
Why it matters in a DAM
B-roll is the asset category in a DAM most likely to be reused far outside the production it was originally shot for, which means its DAM value depends almost entirely on descriptive tagging rather than production metadata. A clip tagged only with the shoot's project name and date is effectively invisible to an editor working on an unrelated project two years later who needs generic "aerial coastline" or "hands typing on keyboard" footage — the exact use case B-roll libraries exist to serve.
A worked example
Common mistake
A common mistake is filing B-roll into a DAM under the production it was shot for, tagged with project name and shoot date but no descriptive content tags — subject, location, shot type, mood — which makes it functionally unfindable for any future project other than the one it originated in.
B-roll footage is supplementary material — establishing shots, cutaways, close-ups, background action — intercut with a main interview or narrative sequence, which is usually called A-roll. The A/B-roll naming dates back to early Hollywood film production, when principal footage was physically the A-roll and a second reel of supplementary material was the B-roll; on 16mm film in particular, B-roll also served a practical function, since splices between shots were more visible on the narrower gauge than on 35mm, and cutting away to a B-roll shot helped mask the visible join. The digital-era term has kept the name and the function while losing the physical film reels it originally referred to.
What distinguishes B-roll as a DAM category is that it’s the footage most likely to outlive the production it was shot for. A-roll — the interview, the scripted scene — is usually specific to one project and rarely reused as-is elsewhere. B-roll of a city skyline, a factory floor, or hands typing on a keyboard has no such constraint; it’s exactly the kind of generic, well-shot material that gets pulled into completely unrelated future projects, provided anyone can find it again.
That reuse potential is also where B-roll most commonly fails inside a DAM. Because it’s typically ingested alongside the A-roll from the same shoot, it inherits the same production-level metadata — project name, shoot date, client — and nothing else, unless someone deliberately adds descriptive tags for subject, location, and shot type. A production-tagged-only B-roll archive is searchable only by people who already know which shoot the footage came from, which defeats the point of keeping a reusable library at all.
- Subject — what’s actually in the shot
- Location — where it was filmed
- Shot type — wide, close-up, aerial, handheld
- Mood — tone or feel of the footage
- Usage rights window — any time, territory, or project-scope limits carried over from location or talent releases
Frequently asked
Where does the term "B-roll" come from?
It dates to early Hollywood filmmaking, when the main footage was the A-roll and a second reel used for cutaways and transitional material was the B-roll (or B-reel). On 16mm film specifically, B-roll also helped mask visible splice cuts, since 16mm's narrower gauge showed splice lines more obviously than 35mm did.
Why does B-roll need different tagging than A-roll in a DAM?
A-roll is usually project-specific and searched for by production name. B-roll's whole value is being reusable across unrelated future projects, so it needs descriptive content tags — subject, location, shot type, mood — rather than just production metadata, or it becomes unfindable outside the shoot it came from.
Is B-roll the same as stock footage?
Not necessarily — B-roll is footage shot for or alongside a specific production (even if it ends up reused elsewhere), while stock footage is typically licensed or shot specifically to be sold or reused across many unrelated projects from the outset. A well-tagged B-roll library functions like an internal stock library over time.
What shot types typically count as B-roll?
Establishing shots, cutaways, close-up detail shots, background/environmental action, and behind-the-scenes footage — generally anything not the main subject speaking or the primary narrative action, used to add context or cover an edit point.
Does B-roll need the same technical metadata (frame rate, timecode) as A-roll?
Yes — B-roll gets cut into the same timelines as A-roll, so frame rate and timecode accuracy matter equally for sync and conform, even though the content tagging needs differ significantly between the two categories.
How should usage rights be tracked for reused B-roll in a DAM?
As an explicit rights/licensing field tied to the specific clip and its original agreement — location releases, talent releases in background shots, or licensed drone footage often carry usage restrictions (time window, territory, project scope) that don't automatically extend to a new, unrelated project just because the file is sitting in the same library.
Sources
- B-roll originated from film-era A-roll/B-roll reel labeling, where the B-roll was used for cutaway and transitional footage. checked 2026-08-07 — Wikipedia — B-roll
- On 16mm film, B-roll was also used to help cover visible splice lines between cuts, a more visible problem on 16mm than on wider 35mm film. checked 2026-08-07 — StudioBinder — What is B-Roll