Short answer
Provide reviewed subtitles and a transcript preserving visual instructions so a video can be understood without audio. Check timing, figures, negations and screen changes; downloading an automatic SRT does not complete review.
Key verification: Play the video without sound and confirm that the task can be followed from the text.
Sources and limitationsSo that a commercial video can be understood without audio, provide revised subtitles and a transcript that preserves the relevant instructions. The result is a readable, synchronized, and verified publishing package. Translation into other languages and designing a training lesson have different objectives.
Start with the final video version
Confirm editing, script and references before correcting times. If you replace a scene, the previous subtitles may no longer match. Identify product names, figures, negations, and button labels that require special review.
Decide what should be understood without the image or without the audio. A voice saying “click here” requires mentioning the button in the transcript. Describe the necessary visual information instead of transcribing only the speech.
Documented Synthesia options
Synthesia distinguishes subtitles that can be activated in the player, dynamic and permanently embedded in your caption help . Document downloading SRT or VTT files after generating the video. Check what format the channel where you will publish it supports.
Hoverable subtitles allow the user to decide whether to display them. Embedded images are part of the image and cannot be disabled. Don't post both overlays without checking the player output.
Original fictional SRT excerpt
1
00:00:01,000 --> 00:00:04,000
Abre la propuesta P-104.
2
00:00:04,500 --> 00:00:08,000
Selecciona «Solicitar revisión»,
no «Aceptar propuesta».This fragment is fictional. The negation changes the action and must be read in full. Adjust timings to the real video: do not use the ones in the example for different content. Divide sentences into understandable units and check that they remain visible for the necessary time.
Transcription with visual information
The W3C guidance on transcriptions explains that it may be necessary to add visual information and who is speaking. For the previous fragment, the transcription can clarify which both buttons appear together and which one is used to request changes.
A transcription needs a reading structure: titles, steps and accessible references. Remove repetitive timestamps if they do not support the intended use, keeping those that serve to locate a passage. Don't turn the document into a block of text without context.
Acceptance checklist
| Check | Expected result |
|---|---|
| Without audio | The action and its limits are understood |
| Figures and negations | They coincide with the final script |
| Synchronization | The text corresponds to the visible scene |
| Player | Does not duplicate or cut subtitles |
| Transcript | Includes essential visual information |
Test the file on the real destination and at a small screen size. If you change the video, update both assets and keep the version reference.
CallsIQ has not generated this package in Synthesia. The fragment and the table are their own resources; The proposed revision does not certify complete compliance with an accessibility standard.
Sources and limitations
Documentary review: . Content type: Documentation-based guide with original resource.
Sources describe terms and capabilities stated by their owners. Proposed protocols and fictional examples do not establish product tests performed by CallsIQ.
- caption helphelp.synthesia.io
- W3C guidance on transcriptionswww.w3.org
Check current terms
Consider these options if they solve the problem described. Confirm features, limits and availability in your country.
SynthesiaAffiliate linkThe labelled commercial links may earn CallsIQ a commission or referral reward. Our commercial policy.
Official sources, explained calculations and clearly labelled examples. Read about our methodology and use of AI in writing.