Define the delivery before translating
A request for Spanish subtitles still leaves decisions open: which audience region, preferred terminology, whether speaker names appear, and who approves the translation. Record those choices with the exact video filename and version.
Also decide whether the destination needs selectable subtitles, text burned into the picture, or both. They are separate deliverables. This guide covers selectable tracks on YouTube, based on YouTube Help pages read on 29 October 2026. It is an editorial workflow, not a test of translation quality.
Choose the file format for what you need to show
Format details are from YouTube's supported-files page. [2] For a tutorial where the bottom of the screen shows important interface elements, WebVTT's positioning support is the practical reason to choose it over SRT.
| Format | Styling on YouTube | Positioning on YouTube | Use it when |
|---|---|---|---|
| SRT (.srt) | None recognised; must be plain UTF-8 | No | Plain dialogue subtitles, widest editor support |
| WebVTT (.vtt) | Bold, italic, underline only | Yes | You must move text away from on-screen UI or lower-thirds |
| TTML / DFXP | Supported (partial implementation) | Yes | A localisation vendor delivers TTML |
| SCC (.scc) | Broadcast caption format | Broadcast | YouTube's preferred format for CEA-608 captions |
Build a language handoff
Keep the source-language transcript as the reference and correct names, numbers and terms against the recording before anyone translates it. Add a short glossary: product names that stay unchanged, terms that need explanation, and the agreed translation for repeated phrases.
Give each target language an owner and a reviewer who can judge meaning in context. A machine draft can be an input, but a file existing on disk does not establish quality. If no qualified reviewer is available, label that language unreviewed and keep it out of the approved delivery.
Check the learner's language requirements — Online Courses Compared — If these subtitles accompany a course, use the learner checklist to separate lecture language, caption availability, assignment language and live-session requirements.
| Deliverable | Record | Acceptance check |
|---|---|---|
| Video | Filename and revision | Every track matches this cut |
| Language track | Language, audience region, format | Meaning checked by a named reviewer |
| Glossary | Names and recurring terms | Terms consistent across cues |
| Player check | Destination and review date | Correct language selectable and readable |
Translate meaning, then review timing
Translations often run longer than the source. Read a short passage while watching the video and check that viewers have time to read it; split or retime cues where needed while keeping them aligned with the speaker.
Practice case (invented): an English cue says The review is on 4 May. The translated cue must keep that date, not silently turn it into April 5 through a date-format mix-up. Check names, dates, decimal separators and units explicitly.
- Check the beginning, a middle passage, the ending and every edited transition.
- Inspect line breaks and whether text covers important visual content.
- Include meaningful non-speech sound descriptions where the agreed deliverable requires captions rather than subtitles.
Upload each translated track through the right path
YouTube's steps are: in Studio, select Subtitles, choose the video, click Add language and select the language, then under Subtitles click Add. You then choose Upload file (With timing or Without timing), Auto-sync, or Type manually. [1]
For a reviewed translation that is already timed, Upload file with timing is the path that keeps your timing. Auto-sync requires the transcript to be in the same language that is spoken in the video, so it is the wrong tool for a translation. YouTube also says transcripts are not recommended for videos over an hour long or with poor audio, and that automatic captions are only available in the video's default language. [1]
Check the destination and keep the handoff
- In the player, select each language yourself and watch the agreed review passages on desktop and a phone.
- Confirm the language label, special characters, timing and text placement.
- Record reviewer, video version, review date and remaining issues in the worksheet.
- When the video changes, mark every language track for review so an approved translation is not paired with the wrong cut.
Questions before you decide
Can I use YouTube auto-sync for a translated transcript?
No. YouTube says the auto-sync transcript must be in the same language that is spoken in the video. Upload a translated track as a timed file instead.
Should I deliver SRT or WebVTT?
SRT is fine for plain dialogue; YouTube ignores styling and positioning in it and requires plain UTF-8. Choose WebVTT if text must be positioned away from on-screen content, since YouTube supports positioning in WebVTT with styling limited to bold, italic and underline.
Does YouTube create automatic captions in every language?
No. YouTube says automatic captions are only available in the video's default language. Other languages need a track you provide.
Sources & verification
Product details and prices can change. Check the linked provider before buying.
- YouTube Help: Add subtitles and captions Accessed 29 Oct 2026
- YouTube Help: Supported subtitle and closed caption files Accessed 29 Oct 2026
Sources link directly to providers. Product buttons may use separately labeled affiliate links. Read our disclosure.