Video Accessibility
Captions vs audio description: find the gaps in a business video
A captioned clip can still leave essential visual information unheard. Review one existing promotional video to identify what depends on sound or sight, then give an accessibility specialist a precise brief rather than a vague request to add subtitles.
Method at a glance
01
Ask what the audience cannot obtain
A shop’s promotional clip might announce a service aloud while showing its booking deadline only on the final card. Someone who cannot hear needs the spoken offer in text. Someone who cannot see needs the deadline in a form they can access without reading that card. Solving the first problem does not automatically solve the second.
The useful distinction in captions vs audio description for business videos is the direction of the information gap. Captions make essential audio available as synchronized text. Audio description makes essential visual information available through sound. Here, “captions” does not mean the marketing copy beneath a social post, and “description” does not mean its upload summary.
This review starts with one existing prerecorded promotional clip and ends with a timestamped accessibility brief. It does not choose video ideas, optimize engagement, teach editing software, or post anything. Keep content accuracy separate too: making an expired offer audible would not make it correct.
02
Separate the alternatives before requesting work
W3C’s captions guidance defines captions as speech and non-speech audio information needed to understand the content, synchronized with the audio. Captions may be closed, so viewers can show or hide them, or open, so they remain displayed. A typed slogan on the picture is not a substitute for everything the soundtrack communicates.
W3C’s description guidance addresses visual meaning that people cannot obtain adequately from the picture. Important actions, a speaker’s displayed name, a service demonstration, or an offer’s on-screen conditions may need description. Not every decorative detail needs narration.
| Alternative | What it makes available | What not to assume |
|---|---|---|
| Synchronized captions | Speech and meaningful non-speech audio as text during playback | Accurate captions do not make unspoken visual facts audible. |
| Audio description | Important visual information through narration, alongside the main audio | Extra narration does not make speech available to someone who cannot hear it. |
| Descriptive transcript | Audio information plus important visual information in a readable text account | A standalone text account is not automatically a substitute for synchronized captions or every description requirement. |
A translation subtitle track is also not proof of complete captions. W3C notes that translated subtitles are usually speech only, although they can include non-speech information. Inspect what the actual track communicates, not just its language label.
03
Find information available only through sound
Identify the exact file or viewing URL, version, language, duration, and review date. If the same clip exists in several cuts, do not combine observations from different versions. Keep the original unchanged during the assessment.
Watch the whole clip with sound to establish what it communicates. Then watch without sound, with the available captions enabled. This is a practical gap-finding aid, not a simulation of every Deaf or hard-of-hearing person’s experience and not a conformance test.
Compare the caption text with the complete soundtrack. Look for:
- Spoken facts that disappear or change meaning: the service, price, location, deadline, or words such as “not.”
- Speaker changes that become ambiguous without a useful identification cue.
- Sounds that carry meaning rather than decoration, such as an off-screen timer that signals a demonstrated action is complete.
- Text that appears too early or late to connect reliably with the speech, or covers essential visual information.
Record the exact timestamp and discrepancy instead of writing “captions bad.” For example: “00:08–00:11: speaker says appointments are not available on Sundays; captions omit not.” This is a fictional error example, not a finding about a real business.
If captions are automatic, do not treat their presence as completion. W3C warns that automatic output needs confirmation of full accuracy. If no caption track is available, record that absence separately from the task of preparing and checking a new one.
04
Find information available only through sight
Listen to the same clip without looking at the picture. Compare what you hear with the meaning you established from the complete video. Ask whether someone could understand the essential message, actions, and next step from the audio—not whether they could reconstruct every camera angle.
Look especially at unspoken text and demonstrative phrases. “Choose this option” may be meaningless if a hand silently points to one of three packages. An end card may contain the only branch name or booking condition. Write down what information is missing and where it appears; do not prescribe narration for every object in the frame.
W3C’s explanation of WCAG 1.2.5 makes an important distinction: if all important visual information is already conveyed in the soundtrack, no additional audio description is necessary. A speaking owner is not automatically a description gap, but a talking-head video can still contain unspoken titles or end-card details worth checking.
Where information is missing, note whether there are pauses in the main audio. W3C explains that description delivery depends on content, timing, and media-player support. A separate description file needs compatible playback; a continuously spoken clip may need a different treatment from one with usable pauses. Ask the specialist to recommend the method rather than assuming that uploading an extra file will work everywhere.
05
Use a gap record, not a single pass badge
The following fictional repair-shop clip illustrates the record. Its details are invented to show the assessment method, not customer results or recommended offer terms.
| Moment | Information and observed gap | Work to brief |
|---|---|---|
| 00:03–00:07 | The owner speaks the service name, but there are no captions. | Prepare and review synchronized captions for the speech and any other meaningful audio. |
| 00:08–00:12 | A card says “Bookings close Friday at 4 PM”; the audio says only “Book soon.” | Make the precise booking condition available without sight; ask the specialist how to convey it in this version. |
| 00:13–00:17 | A technician points to a labeled collection counter; narration says “Collect it here.” | Assess whether the visual location cue is essential, then describe that meaning rather than merely repeating “here.” |
| 00:18–00:22 | The final branch name and contact number are both shown and clearly spoken. | Record that these facts were heard as well as seen; do not add redundant narration solely because text exists. |
Use three observation labels in your own record: Gap observed, Information available in the checked alternative, or Not assessed. A fact available in the soundtrack can still be missing from captions; keep those observations separate. If you cannot access the relevant track or version, leave that part unassessed rather than calling the clip accessible.
06
Give the specialist a decision-ready brief
A useful brief says what viewers are missing, not just which file the team wants back. Include:
- Asset and scope: exact version, language, duration, viewing location, checked date, and the person responsible for the business facts.
- Observed gaps: timestamps, exact speech or visible information, existing alternative, and the meaning that is missing or incorrect.
- Requested work: checked synchronized captions for audio gaps; assessment and a proposed description method for visual gaps; unresolved questions clearly separated from confirmed findings.
- Delivery constraints: intended viewing page or player, known caption/description controls, pauses available for narration, and anything not yet verified about support.
- Review responsibility: who confirms offer details, who checks the adapted content and playback, and who separately authorizes any later replacement of the public clip.
Ask for the adapted version to be reviewed in its intended player, not only as an isolated text file. Check that the correct captions and described version can actually be found and used, that timing preserves meaning, and that the revised audio does not obscure essential speech. This is a requested acceptance check, not a claim that the current clip has passed.
If a descriptive transcript is in scope, include visual meaning as well as the soundtrack. W3C’s transcripts guidance explains why exporting caption text alone usually leaves visual information to add. It also explains the needs of people who are Deaf-blind; captions and audio description are not the whole accessibility picture.
07
Keep the assessment’s limits visible
This brief identifies information gaps; it is not legal advice, an accessibility certification, or a complete WCAG audit. The applicable requirements depend on the media and context. W3C distinguishes the Level A audio-description-or-text-alternative option in WCAG 1.2.3 from the Level AA audio-description requirement in 1.2.5. Do not promise that a transcript alone satisfies every requirement, or that a clip with captions needs no further review. A genuinely silent video-only asset also needs its own requirements review, not a request to caption nonexistent speech.
Keep the findings in your own document and assign the adaptation to a qualified specialist. The LocalCMO approval overview and audit trail overview describe human decisions and separate execution results for supported marketing work. Its Agent audit log help explains activity review within product access, connection, and permission limits. These are workflow background, not evidence that LocalCMO inspects video accessibility, generates captions, produces audio description, or edits this asset.
The immediate outcome is a precise record of what is missing, what is already available, what remains unassessed, and who should resolve it. Approval of that brief is not proof of a corrected viewing experience, permission to publish, or evidence of better engagement, rankings, or revenue.
FAQ
captions vs audio description for business videos FAQ
What is the difference between captions and audio description?
Captions display synchronized text for speech and meaningful non-speech audio. Audio description conveys important visual information through sound when the main soundtrack does not already convey it. They address different information gaps; a clip can need both. Neither means the social post's accompanying text.
Does every business video need a separate audio-description track?
Not necessarily. W3C explains that no additional audio description is necessary when all important visual information is already conveyed in the audio track. Assess the actual clip, including on-screen text and meaningful actions. If information is missing, the delivery method depends on timing and player support; a separate track is not the only option.
Are automatic captions enough for this assessment?
Treat them as a draft until someone checks accuracy and timing against the complete soundtrack. W3C says automatically generated captions do not meet user needs or accessibility requirements unless confirmed fully accurate. Check names, prices, negations, speaker identification, and meaningful sounds rather than relying on the presence of a caption button.
Can a written transcript replace both captions and audio description?
Do not assume so. Captions are synchronized with playback, while a descriptive transcript provides audio information and important visual information in text. W3C distinguishes a Level A text-alternative option under WCAG 1.2.3 from the audio-description requirement at Level AA under 1.2.5. The applicable requirements and complete experience need separate review.
Can LocalCMO caption or audio-describe this clip for me?
This article does not establish a LocalCMO video transcription, caption-generation, audio-description, editing, or accessibility-certification capability. Make the gap record in your own document and brief a qualified specialist. The LocalCMO resources below explain evidence and human approval for supported marketing work, not tools for adapting or publishing this video.