Captions and Transcripts

Use this page to review, correct, or replace the captions on a video.

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Automatic captions

When you upload a video, its audio is transcribed to English and saved as a caption file in the standard VTT format. The player picks the file up automatically, so captions are available to viewers without any further setup.

A caption file is a list of cues. Each cue is one line of on-screen text plus the moment it appears and the moment it goes away, which is what you edit below.

Two things to know:

• English only. Automatic transcription produces a single English track. There is no automatic translation into other languages, and the player carries one caption track per video.
• Videos over 2 GB skip transcription. Upload your own caption file for those, using the steps below.

The Captions section on the video detail page shows which state a video is in: Auto-generated, Uploaded (a person supplied or edited the file), or None.

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Correct captions in the dashboard

Automatic transcription is good but not perfect, especially with clinical terms, drug names, and proper nouns.

1. Open the video and find the Captions section.
2. Choose Edit captions.
3. Play the video. The active cue is highlighted and shown over the player as it plays.
4. Edit any cue's text directly in its row.
5. Adjust timing by typing a timestamp, or by moving the playhead to the right moment and choosing Set start or Set end.
6. Add missing lines with Add cue, and remove stray ones with the row's delete control.
7. Choose Save captions.

Saved captions replace the file the player serves and mark the video's captions as Uploaded. The editor blocks saving while a cue has an invalid time range, so fix any flagged rows first.

To get consistently better first-pass results on terms specific to your organization, add them to your caption vocabulary before uploading.

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Upload your own caption file

If you caption elsewhere, upload the finished file instead:

1. Open the video and find the Captions section.
2. Choose Upload your own (or Replace if the video already has uploaded captions).
3. Pick a VTT or SRT file. SRT files are converted to VTT during upload.

Uploading replaces whatever captions the video had, including automatic ones.

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Download the caption file

Choose the download control in the Captions section to save the current VTT file. This is useful for editing in a dedicated captioning tool, having captions reviewed, or reusing the transcript elsewhere on the page.

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Captions and accessibility

Captions are one of the clearest accessibility wins on a video. Keep in mind:

• Review automatic captions before publishing anything where accuracy matters. Automatic transcription can misrender clinical terminology.
• Viewers control caption appearance themselves through the player's caption settings, so you do not need to style them.
• Captions only help if the viewer can reach them, which means leaving the player controls visible. See Player accessibility.

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Next steps

• Caption vocabulary: teach automatic captions the terms your organization uses.
• Player accessibility: how captions render and what else the player supports.
• Updating a video: replace assets and clear caches after a change.
• Building your own player: use the caption file URL in a player of your own.