Video and Media · THE NO-PANIC PLAN
Prepare accessible captions and disclosures for a video ad
Captions make prerecorded video audio accessible and let viewers follow an ad when they cannot or choose not to hear it. This workflow covers caption production and ad-specific review, not legal approval of campaign claims. FTC material provides U.S. guidance for truthful advertising and endorsements; requirements can differ by jurisdiction and platform. A caption-file checker can catch structural problems, but a person must still verify meaning, timing, sound cues, disclosure placement, and the final player output.
MISSION Prepare an accurate, synchronized caption file for a finished video ad, check that any required advertising disclosure is present in the creative itself, and verify the final uploaded version on its target platform.
Check the final caption fileTHE REAL-WORLD BIT
What happens outside this browser tab?
Freeze the approved ad version and delivery requirements; transcribe the exact final audio including speakers and meaningful sounds; route factual claims and any endorsement disclosure to the campaign owner for evidence and placement review; create a supported caption file with synchronized readable cues; validate file structure; watch the ad with captions enabled and review disclosure visibility in the actual creative; upload to the target placement, test the final rendering on common screens, and archive the approved video, captions, evidence, and version.
YOUR CHECKLIST, WITH FEWER DRAMATIC SIGHES
One step at a time.
Follow the order below. If a step names a Nirmion tool, its link is right there with it.
- 01
Freeze the final cut and identify the delivery target
Record the ad version, language, duration, destination platform, placement, and required caption format before transcription. Confirm whether the destination supports a sidecar caption file, embedded captions, or both, and use its current upload instructions. If the edit, voiceover, offer, price, or end card changes after captioning begins, mark the file stale and restart review against the new cut. Keep captions and on-screen ad text as separate assets so a later edit cannot silently leave the two out of sync.
- 02
Transcribe the exact audio and include meaningful sounds
Create a verbatim transcript from the frozen final audio, checking every product name, number, offer condition, speaker change, and spoken disclosure against the recording. Include speaker identification when needed and meaningful non-speech information such as a sound that changes the meaning of the ad. W3C explains that captions cover dialogue, speaker identity, and relevant sound information, not dialogue alone. Do not use an automatic transcript as final copy; listen to the full track while correcting it and mark uncertain wording for the campaign owner to resolve.
- 03
Review claims and any endorsement disclosure with the ad owner
List each express and implied product, performance, price, health, safety, or testimonial claim and link it to the evidence already approved for this campaign. Ask the responsible advertising reviewer to confirm that any necessary qualification or material-connection disclosure appears clearly in the ad itself and is understandable in the same language as the message. FTC guidance notes that viewers may not see a video description and that a disclosure can be missed if it is hard to notice; do not assume that a caption file or platform toggle alone cures an unclear visual or spoken disclosure. Escalate unresolved claims instead of rewriting them in captions.
- 04
Build a synchronized caption file for the destination
Use the destination?s accepted format and language encoding. For YouTube, its help page lists SubRip (.srt) as a supported basic format and specifies plain UTF-8; other platforms may accept different formats, so confirm the current target instructions rather than assuming .srt works everywhere. Divide text into readable timed cues, keep each cue close to the corresponding speech, and preserve the exact claim and disclosure wording that was approved. Do not shorten a qualification or omit a line simply to make the file fit.
- 05
Run structural validation, then fix every flagged cue
Use Caption File Checker to inspect the caption file for supported structure, cue timing, and parse errors. Treat the output as a mechanical check only: it cannot know whether a product name is wrong, a claim changed, a sound is meaningful, or a disclosure is visible in the ad. Correct encoding, malformed timestamps, overlaps, blank cues, and unreadable line breaks, then rerun the check on the final saved file. Preserve the original approved transcript and version so corrections can be traced.
- 06
Review the captions against the video and the disclosure itself
Play the full ad from beginning to end with captions enabled and compare each cue against speech, speaker changes, meaningful sounds, and scene timing. Check spelling, punctuation, reading speed, line breaks, and any words obscured by player controls or platform overlays. Separately review the visual and audible disclosure in the ad at normal playback size, including muted viewing where relevant; ensure the claim and its qualification are close enough for viewers to understand together. Ask a second reviewer to spot-check the final creative, since a technically valid file can still be inaccurate or difficult to read.
- 07
Upload, test the actual placement, and archive the release copy
Upload the checked caption asset to the chosen platform and preview the actual ad placement on a phone and desktop, including captions-on and muted playback where available. Confirm the correct language, timing, visible claim qualifications, and any disclosure; a successful upload alone is not proof that the captions render correctly. If the creative or placement changes, repeat the checks for the affected version. Store the released video, caption file, transcript, claim-evidence references, reviewer, destination, and approval date together under the campaign?s access and retention rules.
THE HELPER CREW
Tools for the fiddly bits.
These are the currently published Nirmion tools matched to this guide. Open a tool page for its accepted inputs and limits.
RECEIPTS, PLEASE
Sources & review notes
Each source is linked to the steps it supports. Open it to check its scope and current guidance.
Source checked 2026-10-10