Captions for · Use case

Captions for webinars — accessibility-grade, multilingual, replay-ready.

Webinar recordings are watched at 1.5× speed by viewers who couldn't attend live. Clean captions are the difference between a passive replay and a high-engagement asset.

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Aspect ratio
16:9 (1920×1080)
Resolution
1920×1080 — deliver as SRT, not burned-in
Font size
Player-rendered; SRT carries no styling
Safe zone
Most webinar replay platforms (Zoom Cloud, Vimeo, Riverside, On24, BigMarker) render captions inside their player UI. No frame placement needed.

Why captions matter on Webinars & live events

Webinar replays drive 50–70% of total registration for B2B events. Captioned replays index in YouTube/Vimeo search and carry the value of the live event into long-tail discovery.

Recommended style

Soft captions only — viewers want to skim, scrub, and language-switch. Burned-in captions break the replay experience.

The Webinars & live events captioning playbook

  1. 01
    Record the webinar
    Direct line audio from the host's mixer beats compressed Zoom audio. Whisper accuracy on direct audio is 95%+.
  2. 02
    Transcribe with SoCaptions
    Webinar runtimes (45–90 minutes) take 1–3 minutes to transcribe. Word-level timestamps make seek-and-fix fast.
  3. 03
    Edit speaker handoffs and Q&A
    Q&A sections often have accent variety and lower audio quality — pay extra attention to those segments.
  4. 04
    Upload SRT to your replay platform
    Zoom Cloud, Vimeo, On24, BigMarker, Riverside all accept SRT. Translate to top non-English audience languages.
Do
  • Always deliver soft captions. Replay viewers scrub heavily.
  • Translate to your top audience language — webinars are highly localized assets.
  • Caption Q&A even more carefully than the main session — Q&A is where most replay engagement happens.
  • Maintain a master SRT for archival. Use it for blog repurposing.
Don’t
  • Don't burn captions into the webinar replay. Breaks scrub and language-switch.
  • Don't ship raw auto-generated captions on technical webinars. Vocabulary needs human review.
  • Don't skip captions on the live broadcast — accessibility law often applies.
  • Don't deliver TXT transcripts in place of SRT. Timed seek matters for replay.

Frequently asked

Should webinar captions be live or post-event?+

Both. Live captioning for accessibility and engagement during the event; cleaned-up SRT for the replay. Live captions can be auto-generated; replay captions should be hand-corrected.

What platforms support uploaded webinar captions?+

Zoom Cloud, Vimeo, Riverside, On24, BigMarker, Demio, Livestorm — all accept SRT.

How accurate is AI on webinar audio?+

95%+ on clean direct-line audio. Drops to 85% on compressed Zoom audio with multiple participants.

Keep reading

Accessible video content guidelines for creators and teams

A practical accessibility guide for captions, transcripts, audio clarity, visual contrast, motion, and publishing workflows.

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