How to add captions to an existing video and correct every word

Upload a creator-owned file or start from a supported source, then open the prepared clip in the editor. Wait until the video and transcript are ready before judging caption timing; editing against a placeholder or incomplete transcript creates unnecessary rework.

Play the first few seconds with sound. Confirm that the transcript belongs to the visible source and that the selected clip begins on a complete thought rather than halfway through a word.

Use the transcript beside the preview as your editing map. Read the sentence before and after the selected range so you know whether the clip has enough context to stand on its own.

Do not correct every harmless speech pattern. Focus first on errors that change meaning: people and company names, technical terms, dates, prices, places, and words that support the hook or conclusion.

Select the inaccurate word and replace it with the intended text. Keep the correction faithful to what the speaker said; captions are not the place to silently rewrite an opinion or add a claim that is missing from the audio.

After each important correction, replay a short window around it. This catches text that is technically correct but appears too early, too late, or in a line break that is difficult to read.

• Use the spelling the speaker or brand uses publicly.
• Keep numerals and units consistent inside one clip.
• Avoid turning conversational speech into dense written prose.
• Check mixed-language lines at normal playback speed.

Apply a caption preset that fits the brand and the amount of text on screen. A strong style creates hierarchy without covering the speaker’s mouth, the subject of a B-roll shot, or important embedded text.

Preview light and dark parts of the clip. A style that works over one frame may disappear over another, so check contrast, outline or background treatment, line length, and safe placement across the full selected range.

Play the clip from the beginning with trims, B-roll, video inserts, and mixed audio active. Captions should stay above visual inserts and remain synchronized when the picture changes.

If you change text, timing, or media after approval, review again. The goal is to approve the complete composition the viewer will receive, not an earlier version of one layer.

Submit the reviewed edit and wait for the finished clip. Open it from the Library, scrub to the densest caption section, and watch once at normal speed.

Verify that corrected words are present, captions remain inside the frame, and no line is hidden by the platform UI safe areas you plan to use. If something feels rushed, return to the editor, adjust, review, and export the corrected version.