How Do I Make Videos Accessible? Captions, Transcripts, and Audio Description

Video has become essential to how we communicate online—product demos, training materials, marketing content, tutorials. But video is inherently inaccessible without intervention. Users who can't hear miss dialogue and sound effects. Users who can't see miss visual-only information. Users with cognitive disabilities may need alternatives to time-based media.

Making videos accessible isn't just about compliance—it benefits everyone. Captions help users watching in noisy environments or without sound. Transcripts are searchable and indexable. Accessible videos reach more people.

Here's how to make your videos work for everyone.

Q: How do I make videos accessible?

A: Video accessibility requires captions (synchronized text showing dialogue and important sounds), transcripts (text version of audio content), and audio description (narration of visual-only content) when needed. Captions are essential for deaf users, transcripts help deaf-blind users and enable searching, and audio description makes visual content accessible to blind users.

Understanding Video Accessibility Requirements

WCAG Video Requirements

The Web Content Accessibility Guidelines have several criteria addressing video:

Level A (Essential):

• 1.2.1 Audio-only and Video-only: Provide alternatives for audio-only or video-only content
• 1.2.2 Captions: Captions for prerecorded video
• 1.2.3 Audio Description or Media Alternative: Description of visual content

Level AA (Standard target):

• 1.2.4 Captions (Live): Captions for live video
• 1.2.5 Audio Description: Audio description for prerecorded video

Who Benefits

Captions benefit:

• Deaf and hard of hearing users
• Non-native language speakers
• Users in sound-sensitive environments
• Users with auditory processing differences
• Anyone watching without sound

Audio description benefits:

• Blind and low vision users
• Users who are multitasking
• Users who process information better aurally

Transcripts benefit:

• Deaf-blind users (who use braille displays)
• Users who prefer reading
• Search engines indexing content
• Users who need to search video content

Captions: The Essential Element

What Are Captions?

Captions are synchronized text that displays dialogue and relevant sounds during video playback. They're sometimes called "subtitles for the deaf and hard of hearing" (SDH) or "closed captions" (CC).

Captions include:

• All spoken dialogue
• Speaker identification when needed
• Sound effects relevant to understanding ("[phone rings]", "[door slams]")
• Music description when relevant ("[upbeat music plays]")

Captions vs. Subtitles

The terms are sometimes used interchangeably, but there's a distinction:

Subtitles: Translation of dialogue for users who can hear but don't speak the language. Typically don't include non-speech sounds.

Captions: Same language as audio, including non-speech sounds. Intended for deaf/hard of hearing users.

For accessibility compliance, you need captions, not just subtitles.

Caption Quality Standards

Good captions aren't just accurate transcription. Quality standards include:

Accuracy: Verbatim or near-verbatim capture of speech (minor editing acceptable for clarity)

Synchronization: Text appears when words are spoken and disappears appropriately

Readability: Appropriate reading speed (typically 200 words per minute or less), reasonable line length

Placement: Text doesn't obscure important visual content

Speaker identification: Clear when multiple speakers are present

Sound effects: Relevant non-speech audio is described

Creating Captions

Option 1: Professional captioning services

Most reliable quality. Services like Rev, 3Play Media, and others provide human-generated captions with quality guarantees.

Cost: Typically $1-5 per minute of video

Option 2: Auto-captions with editing

YouTube, Vimeo, and other platforms generate automatic captions. These require editing—accuracy varies from 70-95% depending on audio quality and complexity.

Process:

1. Upload video to platform with auto-captioning
2. Download auto-generated captions
3. Edit for accuracy, add sound descriptions
4. Upload corrected captions

Option 3: DIY captioning

Most time-intensive but gives full control. Tools like Subtitle Edit (free) or Descript help create caption files.

Caption File Formats

SRT (SubRip): Most widely supported format

1
00:00:01,000 --> 00:00:04,000
Welcome to our product demo.

2
00:00:04,500 --> 00:00:08,000
Today I'll show you how to get started.

VTT (WebVTT): Modern web standard, supports styling

WEBVTT

00:00:01.000 --> 00:00:04.000
Welcome to our product demo.

00:00:04.500 --> 00:00:08.000
Today I'll show you how to get started.

Other formats: TTML, SCC, DFXP—used in specific contexts (broadcast, specific platforms)

Transcripts: The Searchable Alternative

When Transcripts Are Required

Transcripts provide a full text version of video content. They're required for:

• Video-only content (no audio)
• Audio-only content (podcasts)
• As an alternative when audio description isn't provided (Level A)

Transcripts are recommended for all video content as an additional accessibility layer.

What Transcripts Include

Basic transcript:

• All spoken content
• Speaker identification
• Relevant sound descriptions

Descriptive transcript:

• Everything in basic transcript
• Description of visual content
• All information from audio description

Creating Transcripts

If you have captions, converting to transcript is straightforward:

1. Export caption file
2. Remove timing information
3. Format for readability (paragraphs, speaker labels)
4. Add descriptions of visual-only content

Format example:

[VIDEO: Company logo animation]

SARAH JOHNSON, CEO: Welcome to Acme Corporation's 2024 overview.

[VIDEO: Graph showing revenue growth from 2020-2024]

SARAH: As you can see, we've experienced consistent growth over
the past four years, with revenue increasing 40% overall.

[VIDEO: Team photos from various office locations]

SARAH: This success is thanks to our incredible team across our
five global offices.

Transcript Placement

Place transcripts where users can find them:

• Expandable section below video
• Link to transcript page
• Downloadable document

Ensure the connection between video and transcript is clear.

Audio Description: Making Visual Content Accessible

What Is Audio Description?

Audio description (also called "video description" or "described video") is narration that describes visual content during pauses in dialogue. It makes visual-only information accessible to blind and low vision users.

Audio description tells users:

• Actions and movements
• Scene changes and locations
• On-screen text
• Visual information essential to understanding

When Audio Description Is Needed

Required when: Visual content conveys information not available in the audio track.

Examples needing audio description:

• Demonstrations showing how to do something
• Charts, graphs, and data visualizations
• Physical actions important to the narrative
• On-screen text not spoken aloud
• Character expressions or reactions crucial to meaning

May not need audio description:

• Talking head videos where all information is spoken
• Videos with comprehensive narration already describing actions
• Content where visuals merely accompany audio

Creating Audio Description

Standard audio description: Recorded narration inserted during natural pauses in the video.

Extended audio description: Video pauses to accommodate description when natural pauses are insufficient. Required at WCAG Level AAA, not AA.

Process:

1. Identify what visual content needs description
2. Write description script
3. Record narration fitting into available pauses
4. Mix audio description track with original audio
5. Provide as alternate audio track or separate video version

Tips for writing descriptions:

• Be concise—fit into available time
• Describe what's relevant, not everything
• Use present tense ("Sarah opens the door")
• Don't interpret—describe objectively
• Prioritize information essential to understanding

Audio Description Options

Separate described version: Create two versions of the video—one standard, one with audio description.

Audio description track: Some platforms support multiple audio tracks. Users can toggle description on/off.

Integrated description: Plan description during production. Narrator describes visual content as part of the original script.

Accessible Video Players

Player Requirements

The video player itself must be accessible:

Keyboard operation:

• Play/pause with Space or Enter
• Volume control with arrow keys
• Caption toggle accessible
• Fullscreen accessible
• Progress bar navigable

Screen reader compatibility:

• Controls properly labeled
• State changes announced (playing, paused)
• Current time/duration available

Visual accessibility:

• Sufficient contrast on controls
• Focus indicators visible
• Controls large enough to target

Platform Considerations

YouTube: Generally accessible player, auto-caption generation, supports multiple caption tracks. Good default choice.

Vimeo: Accessible player, supports captions, some audio description support.

Self-hosted (HTML5 video): Requires attention to player accessibility. Consider accessible player libraries if building custom.

Social media platforms: Accessibility varies. Instagram and TikTok have caption support; accessibility of players varies.

Avoiding Autoplay

Autoplaying video creates accessibility problems:

• Disrupts screen reader users
• Can trigger vestibular issues (motion sensitivity)
• Interferes with focus

If video must autoplay, ensure it:

• Starts muted
• Has visible, accessible pause control
• Stops after 5 seconds or has stop control

Video Accessibility Workflow

Planning Phase

Script with accessibility in mind:

• Narrate visual actions that viewers need to understand
• Avoid "as you can see here" without explanation
• Plan for caption timing (don't talk too fast)

Consider audio description needs:

• Can visual content be described verbally in the script?
• Where are natural pauses for description?
• Does visual content require description at all?

Production Phase

Audio quality matters: Clear audio = better auto-captions = less editing

Avoid text-only segments: If text appears on screen, read it aloud

Allow pauses: Moments of silence make audio description possible

Post-Production Phase

1. Generate or create captions
2. Review and edit captions for accuracy
3. Create transcript from captions
4. Assess need for audio description
5. Create audio description if needed
6. Test with screen reader and keyboard
7. Ensure player is accessible

FAQ Section

Q: Are auto-generated captions sufficient for accessibility?

A: No. Auto-generated captions typically have significant errors (wrong words, missing content, incorrect timing). WCAG requires captions to be accurate. Use auto-captions as a starting point, but always review and correct them. Accuracy rates vary, but even 90% accuracy means 1 in 10 words is wrong.

Q: Do all videos need audio description?

A: No—only videos where visual content conveys information not available in the audio. A video of someone speaking where all information is spoken doesn't require audio description. A product demonstration showing how to assemble something does. Assess each video for visual-only information.

Q: Can I just provide a transcript instead of captions?

A: For prerecorded video, WCAG Level A requires either captions OR a transcript. Level AA requires captions specifically. Captions provide synchronized experience that transcripts don't—deaf users can follow along with the video timing. Best practice: provide both.

Q: How do I handle videos in multiple languages?

A: Provide captions in each language the video is available in. Consider providing translated caption tracks for videos in other languages. YouTube and other platforms support multiple caption tracks for different languages.

Q: What about user-generated video content?

A: If your platform hosts user-generated videos, encourage caption creation (provide easy tools), offer auto-captioning as starting point, and consider whether your terms of service should address accessibility. Platforms like YouTube make caption contribution possible.

Making Video Accessibility Manageable

Video accessibility can seem overwhelming, but it's achievable with the right process:

Start with captions: They're the most impactful element and often required.

Use auto-caption tools: They dramatically reduce effort compared to starting from scratch.

Plan for accessibility: Integrate accessibility into production rather than adding it after.

Prioritize: High-traffic videos, training content, and legally-required content first.

Accessible videos reach more people, perform better in search, and demonstrate commitment to inclusion. The investment pays off.

Ready to assess your digital content accessibility? Get a free accessibility scan to identify issues across your website, including video content.

Related Articles:

• Alt Text Best Practices for Images
• WCAG 2.2: What's New and How to Comply
• How Do Screen Readers Work?

Honesty first: AI helped write this. Our accessibility team reviewed it. This isn't legal advice. For real compliance guidance, talk to professionals who know your business.