How to Add Audio Description to Existing Videos

Introduction

Many organizations today face a familiar challenge: they've already created large libraries of video content, but much of it is not fully accessible.

As ADA Title II enforcement ramps up, and as accessibility expectations rise across sectors, retrofitting existing videos with audio description (AD) has become a priority.

The good news? Adding audio description no longer has to be an expensive, slow, or complex process. Thanks to AI-powered tools like ViddyScribe, it's now faster and more affordable to make your existing video content accessible.

In this guide, we'll show you how.

What Is Audio Description?

Audio description is a spoken narration that describes important visual information in a video, such as actions, on-screen text, scene changes, and facial expressions, for viewers who are blind or have low vision.

It plays during natural pauses in the audio, supplementing dialogue and sound effects.

Example:
"A banner reading 'City Budget Meeting, April 3rd' appears on screen."
"The instructor writes 'E=mc²' on the whiteboard."

Without audio description, blind and low-vision users miss critical information that captions and dialogue alone don't convey.

Why Audio Description Is Required

ADA Title II requires state and local government bodies, including public schools and universities, to make their digital content accessible. The U.S. Department of Justice points to WCAG 2.1 Level AA as the standard, and two of its criteria apply directly to video:

• Success Criterion 1.2.5: audio description for all prerecorded video, so people who cannot see the screen still get the visual information.
• Success Criterion 1.2.2: captions for all prerecorded audio, so people who are deaf or hard of hearing get what is said.

If your videos are embedded on a website, LMS, or public platform and lack audio description, your organization may be out of compliance.

Need the legal context first? Review our breakdown of ADA Title II requirements for video content, then come back here for the implementation workflow.

The Traditional Way to Add Audio Description (Manual Production)

Historically, adding audio description meant:

1. Hiring a writer to script the descriptions.
2. Recording a professional voiceover.
3. Re-editing the video to integrate the narration or creating a separate descriptive audio track.
4. Testing and QA to ensure compliance.

This process is:

• Expensive (often $15–$35 per minute of video)
• Time-consuming (weeks per video)
• Difficult to scale (impractical for large video libraries)

That's why many organizations have struggled to retrofit existing content, until now.

Faster, Scalable Audio Description

ViddyScribe uses advanced AI to analyze your video and generate audio description without the need for manual scripting or voice recording.

Benefits:

• Cost savings: a fraction of the cost of traditional production.
• Speed: process videos in minutes, not weeks.
• Scalability: handle entire libraries of videos efficiently.
• Superior quality: best-in-class output with the simplest user experience.
• Flexible output: export VTT files or descriptive audio tracks ready for your website or video player.

For individuals and organizations facing large backlogs of inaccessible video content, ViddyScribe offers a practical path to accessibility.

Add Audio Description With ViddyScribe

ViddyScribe generates audio descriptions for your video in minutes, and your original video is never re-edited or re-uploaded. The guides below walk through it.

Start here

How to Generate AD for Your Video

The whole run, with screenshots of every step.

Edit and render

How to Edit Your Audio Descriptions

Read the script and change the wording before the video is made.

Then publish it

• Upload the VTT file alongside your video on your website or LMS.
• If your platform supports a descriptive audio track, add the mixed audio instead.
• Or publish the video with the description baked in, which works anywhere a regular video goes.

Conclusion

Retrofitting existing video content for ADA Title II and WCAG 2.1 compliance used to be a massive barrier, especially when it came to adding audio description.

ViddyScribe makes it easy.

• No re-editing required
• Works with your existing video platforms
• Best-in-class output with the simplest user experience
• Affordable and fast
• Scales to large video libraries
• Plus, get closed captions in 53 languages for complete accessibility

If your organization is ready to tackle its backlog of inaccessible videos or ensure that new content meets accessibility standards, ViddyScribe is ready to support that workflow.

Review pricing or try ViddyScribe today.

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