The short answer
Open captions remain visible and cannot be switched off; closed captions can be turned on or off in a supporting player. Use a separate track when viewer choice, multiple languages or later corrections matter. Use a burned-in version when the placement requires the words to remain in the picture, and keep a clean master plus the editable captions.
The difference is how the text is delivered
“Open” and “closed” describe whether viewers can hide the captions. For a typical online video workflow, burned-in text is an open-caption delivery: the letters are encoded into the picture. A separate caption file can provide a closed-caption experience when the player loads it and exposes a caption control. Saving an SRT beside an MP4 does not, by itself, attach the track on every website.
This guide concerns publishing web and product videos. Cinema listings also use these terms, but a theater’s equipment and booking arrangements are a different question. For your upload, decide around the destination player and the viewer’s needs rather than assuming a file extension determines the viewing experience.
Captions and translated subtitles describe the content of the text, not whether it is optional. The wording varies by region. Captions commonly convey speech and relevant sounds; translated subtitles convey another language. Either kind of text may be delivered as a separate track or burned into the image.
Watch the same demonstration both ways
These players reuse our actual 24-second espresso demonstration and the subtitle burner’s exported MP4. The footage is an edited Mixkit clip with original narration generated from our script. This is a demonstration of delivery behavior, not an audience study. Both versions contain the same English explanation.
In the first player, use the caption menu to select English, then switch it off. The clean picture should remain. In the second, the English words are already part of the video, so they remain during the timed intervals even without a separate track. The exact caption-menu location depends on the browser. Start playback if the menu has not appeared yet.
Compare the same moment around two seconds. Then check the end of the clip: captions should disappear after the last cue rather than linger over the final picture. Do this on the device your audience uses. A wide desktop preview can make a caption look more readable than it will be inside a small embedded player.
Read the demonstration transcript
This short demonstration shows an espresso machine in use. Coffee flows from the spout into a metal cup below. The close-up makes the brewing process easy to see. Clear captions can explain what is happening, even with the sound off. Before sharing a translated version, review the wording and check the subtitle timing.
Read the demonstration transcript
This short demonstration shows an espresso machine in use. Coffee flows from the spout into a metal cup below. The close-up makes the brewing process easy to see. Clear captions can explain what is happening, even with the sound off. Before sharing a translated version, review the wording and check the subtitle timing.
Compare the trade-offs before exporting
Start with one reviewed caption source and choose the delivery after checking the destination. You may need both versions for different placements. For example, a product help page might offer selectable language tracks, while a separate presentation might need an always-visible English export. These are planning examples, not claims about which version converts better.
Open captions give you control over their appearance at export time. They also fix the size and position relative to the image. Closed captions let the player handle presentation, with customization depending on the player. Test the actual combination of file, embed and device; support in one desktop player is not evidence that every embed behaves identically.
| Decision | Open / burned-in | Closed / selectable |
|---|---|---|
| Can viewers hide the text? | No; it is part of the picture. | Yes, in a supporting player. |
| Can viewers choose a language? | A separate video export is normally needed for each burned language. | The player may offer multiple supplied tracks. |
| How do you fix one word? | Edit the caption source and export the video again. | Replace or edit the track using the destination’s workflow. |
| How is the text displayed? | Position and appearance are set in the exported picture. | The file and player determine the available presentation. |
| What must you retain? | Clean video, editable captions and the final export. | Clean video, each caption track and the delivery settings. |
Choose a separate track when the player supports it
A separate track is useful when a viewer should be able to choose text, when one video has several subtitle languages, or when you expect small wording corrections. It also keeps the picture free of permanent text. Verify that captions remain available in the embedded version, not just when you open the video on its hosting platform.
Check the required format. YouTube documents basic UTF-8 SRT support without style markup. The HTML track element used by web video players loads WebVTT. These are destination-specific facts; they do not make SRT and VTT universally interchangeable. Our format guide includes downloadable examples and conversion limits.
If the caption option is missing, check that the track was actually added, that its file can be loaded, and that the selected language is correct. Then check that the cue times fall inside the video. A file can be present while no text appears at the moment you are watching. Do not use a successful upload alone as the final check.
Choose burned-in text when it must stay visible
A burned-in version can suit a placement where the video must carry its text in the image and a reliable caption selector is unavailable. Prepare the final wording and timing first. After exporting, watch the downloaded MP4 independently, with the player’s optional captions switched off, so you can judge the words that are actually in the picture.
Check contrast, line wrapping and what the text covers. In a product close-up, a caption can obscure the part being explained. Recast’s free burner uses existing SRT or VTT timings and its own rendering layout; it is not a full visual caption-design editor. If a particular layout is essential, choose an editing workflow that can produce it and verify the export.
Keep the clean source video. Once words are encoded into the picture, a caption toggle cannot remove them. A correction requires returning to the clean source and exporting again with revised captions. Trying to cover the old text creates another layer of editing and can hide useful image detail.
Avoid two sets of captions on top of each other
If you upload a video with burned-in text and also enable an optional caption track, both sets may appear together. Test with the track both on and off. They may have different line breaks or occupy different parts of the picture, making the duplication easy to miss if you check only one setting.
For a selectable-caption release, use the clean master and supply the reviewed track. For an always-visible version, review the burned export and the destination’s caption behavior together. If the destination also needs a separate track, plan how the two will be presented rather than assuming the player will detect and hide burned words.
Finish with a short release check: correct language, readable first and last cues, complete text, sensible timing, no essential picture detail covered, and no accidental duplication. Where access to audio information matters, review meaningful sounds and speaker changes too. Choosing open or closed captions does not by itself establish the completeness or quality of the captions.