Add captions to each prerecorded video in YouTube Studio, then test the continuous live output separately. A subtitle track attached to an uploaded video is not automatically guaranteed to become closed captions in a 24/7 live stream: the playout system must also send captions to YouTube in a supported live format. Here’s how to prepare the video captions, check the kids’ audience setting, and verify what viewers actually see.
How to add captions to each prerecorded video
Add a subtitle track to every source video in YouTube Studio. For a repeatable library workflow, prepare a timed caption file such as SRT or SBV, then upload it to that video’s Subtitles page. If you have a transcript but no timestamps, use Auto-sync; for short videos or focused corrections, type captions in Studio.
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1. Prepare and review the transcript
Use the language spoken in the video and check names, pronunciation, and vocabulary children may hear. Include meaningful non-speech audio cues where they help viewers understand what is happening. YouTube cautions that automatic captions can misrepresent speech because of accents, dialects, mispronunciations, background noise, silence, overlapping speakers, or unsupported languages. Review and correct captions rather than assuming an automatically generated track is accurate. YouTube Help: Use automatic captioning.
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| Method | Best for | What to check |
|---|---|---|
| Upload a timed SRT or SBV file | A caption file already timed in an editor, or a repeatable library workflow | Confirm the transcript, timing, language, and file encoding. |
| Auto-sync a transcript | A transcript without timestamps | The transcript must match the spoken language. YouTube does not recommend this method for videos over an hour or with poor audio quality. |
| Type manually in Studio | Short videos or targeted corrections | Allow time to cover and review the whole video; Studio sets timings as you enter caption text. |
| Use automatic captions | A starting point when you have not prepared a caption file | Availability and accuracy vary. Review and correct the result. |
YouTube recommends SRT or SBV as practical beginner formats. An SRT should be plain UTF-8. Basic SRT and SBV captions use text and timecodes; do not rely on styling markup in those formats. YouTube Help: Supported subtitle and closed caption files.
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3. Add the track in YouTube Studio
- Open YouTube Studio and select Subtitles from the left menu.
- Select the video you want to caption.
- Select Add language and choose the language of the captions.
- Under Subtitles, select Add.
- Choose Upload file for a timed SRT or SBV file, then upload it with timing. Choose Auto-sync to submit transcript text without timestamps, or Type manually to enter captions in Studio.
- Review the captions against the video, then save or publish the track.
You can also add captions during video upload. YouTube’s current step-by-step options are described in YouTube Help: Add subtitles and captions.
4. Check every video and language track
Play each source video with its caption track enabled. Check that captions align with speech, that names and child-directed vocabulary are correct, and that useful speaker or sound cues are present. A large playlist needs this review for each source video; a caption track on one video does not caption the others.
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Will uploaded captions appear on the 24/7 live stream?
Do not assume so. Captions added to a prerecorded video’s YouTube Studio subtitle track and captions delivered with a live stream are separate parts of the workflow. YouTube’s live-caption guidance describes captions embedded in the stream as CEA-608 or CEA-708 data, or captions sent through supported software over HTTP. It does not establish that every local or cloud playout system reads each video’s Studio subtitle track and passes its captions through as synchronized live captions. See YouTube Help: Use automatic captioning and YouTube Help: Manage live stream settings.
Test the actual delivery path
- Ask the playout provider whether it reads per-video YouTube subtitle tracks or caption files and emits synchronized captions in a live format YouTube supports.
- Set up a test stream using the same encoder, playlist, and caption workflow you plan to use continuously.
- Open the live player as a viewer and check whether captions can be enabled and remain synchronized as playback moves between source videos.
- Repeat the check after any change to the encoder, playlist, subtitle tracks, or stream setup.
If the system cannot pass through the source tracks, ask the provider what live-caption method it supports. You may need a compatible caption feed or an encoder workflow that embeds supported captions. A source video’s Studio subtitles alone are not proof of live caption delivery.
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Set the audience correctly for children’s content
In YouTube Studio, set whether each video is made for kids based on its audience. YouTube requires creators to identify this accurately. Made-for-kids settings restrict features, including live chat, so do not build the stream workflow around chat being available. The audience setting is separate from adding a subtitle track; it does not caption a video or make its captions pass through to the live encoder. See YouTube Help: Set your channel or video’s audience.
YouTube’s upload flow also includes original video language and caption certification fields. Caption certification concerns certain content shown on U.S. television; it is not the same thing as uploading captions for your video. YouTube Help: Upload videos.
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Troubleshooting caption problems
| Symptom | Likely cause | What to do |
|---|---|---|
| No caption option on the source video | The subtitle track may not have been saved or published, or the selected language track may be missing. | Return to Studio → Subtitles → select the video and confirm the language and track are present and published. |
| Text appears at the wrong time | Timecodes may be incorrect, or transcript auto-sync may not have aligned well. | Review playback against the captions; correct the timing in the caption file or Studio and test again. |
| Uploaded SRT is rejected or displays incorrectly | The file may not be plain UTF-8, may have malformed timing, or may rely on unsupported styling markup. | Use a basic SRT or SBV file with text and timecodes, correct its encoding and timing, then upload again. |
| Automatic captions are missing or inaccurate | Audio quality, overlapping voices, silence, accents, dialects, mispronunciations, or language support can affect availability and recognition. | Use a reviewed transcript and timed file, or correct the generated track in Studio. |
| Captions work on the uploaded video but not in the live player | The encoder may not be carrying the source subtitle track into the live feed. | Check the playout provider’s caption support and test a live caption workflow using supported embedded captions or compatible software. |
| Auto-sync performs poorly | The transcript may not match the spoken language, or the video may be over an hour or have poor audio quality. | Check transcript language and accuracy; use a timed caption file or manual editing instead. |
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