How to Add Subtitles to YouTube Videos

Subtitles let viewers read the speech while a video plays. Captions can also describe relevant sounds and identify a speaker who is off screen. For your own YouTube videos, start with the available caption track or prepare a timed subtitle file, then check the wording and timing before publishing.

Choose a starting point

• Existing automatic captions: review and edit the track if the speech has been captured reasonably well.
• A prepared transcript: use it as the basis for subtitles, checking that it matches the final edit of the video.
• No usable transcript: transcribe the speech first, then review the resulting text and timings.

A downloadable transcript and a subtitle file serve different purposes. A document is comfortable to read, while a timed file tells the player when to display each caption. Keep timing information when preparing subtitles.

Prepare a timed file with Transcript Guru

Open the subtitle downloader and paste the video’s YouTube URL. Select the correct caption language and check the text against the video. Download a timed subtitle file for use in your editor. Reading available YouTube captions and downloading SRT or VTT files do not require Transcript Guru credits.

If usable captions are unavailable, AI transcription is a separate choice that requires eligible paid access and uses credits. It works from speech in the audio. It does not reconstruct every visible label or sound cue, so add information needed to understand the video during your review.

Add the file in YouTube Studio

1. Sign in to YouTube Studio and open Subtitles. Choose the video you can edit.
2. Add the appropriate language, then add subtitles for that language.
3. Choose the file upload option. For a file that already contains timestamps, select the option with timing.
4. Review the uploaded track against the video and save it. Check the published video to confirm that viewers can select the track.

YouTube also offers manual entry and transcript synchronization options. The current steps and requirements are described in YouTube’s subtitle instructions.

Check text, timing and readability

Read the subtitles while watching the final video. Check names, specialist terms, numbers and negation carefully. If two people speak together, do not guess a missing sentence merely to make the caption look complete.

A caption should appear when the relevant speech begins and remain long enough to read. Break long passages into manageable units at natural phrase boundaries. Avoid placing an unrelated fragment on the next screen. Check the result on a phone as well as a larger display.

As an illustrative editing example, ‘Bring your bicycle on Saturday at ten’ is easier to follow as one short instruction than as several rapidly changing fragments. The correct timing still depends on the actual recording; the sentence alone does not establish when a caption should start or end.

Add meaningful sound cues when the viewer needs them to follow what is happening. Review speaker identification where the voice is not obvious from the picture. Automatic speech transcription is a draft for this review, not a guarantee of complete accessible captions.

Add another subtitle language

Translation changes the language of an existing transcript. In Transcript Guru, it requires sign-in and uses credits. Review the translated text before exporting its timed file, especially names, terminology and phrases that may need more reading space.

Upload the translated track under its own language in YouTube Studio. Check that its text and timing match the final video. Do not label the original-language text as a translation.

Follow the subtitle translation guide.

Before you publish

• Confirm that you have permission to edit the video and use the transcript.
• Check the start, middle and end for timing drift, then review uncertain passages.
• Verify the language label and test the viewer’s caption selector.
• Keep the source file so corrections can be made without starting again.

If a caption track exists but will not load, troubleshoot that problem before paying to transcribe the audio again. Check the missing captions guide.