Video Captioning Requirements — WCAG 1.2.2 Complete Guide (2026)
⚠️ Did You Know? 466 million people worldwide have disabling hearing loss. Without captions, your video content is completely inaccessible to them — and you're violating ADA requirements.
✅ Check Your Website's ADA Compliance
Ensure your video content meets WCAG captioning requirements. Free scan included.
Run Free ADA Scan →What Are WCAG Captioning Requirements?
The Web Content Accessibility Guidelines (WCAG) have specific requirements for video captions under Success Criterion 1.2.2 (Level A) and 1.2.4 (Level AA).
📋 Key WCAG Criteria for Video
- 1.2.1 — Audio-only and Video-only (Level A): Provide transcript for audio-only or video-only content
- 1.2.2 — Captions (Prerecorded) (Level A): All prerecorded video needs captions
- 1.2.3 — Audio Description or Media Alternative (Level A): Provide audio description or transcript
- 1.2.4 — Captions (Live) (Level AA): Live video needs captions
- 1.2.5 — Audio Description (Prerecorded) (Level AA): Provide audio description for video
Closed Captions vs Open Captions — What's the Difference?
| Type | Description | Best For |
|---|---|---|
| Closed Captions (CC) | User can turn on/off. Customizable display. | Web video, streaming platforms, social media |
| Open Captions (Burned-in) | Always visible. Cannot be turned off. | Social media posts, public displays, short videos |
🎯 Which One Should You Use?
Closed captions are preferred because users can turn them off if not needed. WCAG doesn't require open captions specifically — either works, but closed captions provide better user experience.
Caption Quality Requirements
Not all captions are created equal. WCAG doesn't specify exact quality standards, but industry best practices include:
- ✅ Synchronized — Captions must match the audio timing
- ✅ Equal access — All spoken content + meaningful sound effects
- ✅ Speaker identification — Indicate who is speaking
- ✅ Readable — Sufficient contrast, font size, and duration
- ✅ Accurate — No spelling or grammar errors
✅ Good Caption Example:
[Speaker: Jane] To get started, click the blue button.
[sound: button click]
❌ Bad Caption Example:
to get startid click the butn
(Missing speaker ID, misspelled, no sound effects)
How to Add Captions to Videos — Step by Step
Method 1: YouTube (Free)
1 Upload your video to YouTube
Set to "Unlisted" or "Public" depending on your needs.
2 Use auto-captioning
YouTube Studio → Subtitles → Auto-translate (free but accuracy varies).
3 Edit and correct
Review auto-captions and fix any errors (very important!).
4 Embed video on your website
Use YouTube embed code — captions will automatically work.
Method 2: Vimeo (Paid Plans)
1 Upload video to Vimeo
Vimeo Plus or higher includes captioning features.
2 Upload caption file (.SRT or .VTT)
Upload your prepared caption file to Vimeo.
Method 3: Manual Captioning with .SRT Files
1 Create .SRT file
Format example:
00:00:01,000 --> 00:00:04,000
Welcome to our video about accessibility.
2
00:00:04,001 --> 00:00:08,000
Today we'll learn about captioning requirements.
2 Upload to video player
Most video players support .SRT or .VTT files.
🔍 Need Help with Video Accessibility?
Run a free ADA compliance scan to check if your videos meet WCAG requirements.
Scan Your Website →Audio Descriptions — What Are They and When Do You Need Them?
🎧 What Are Audio Descriptions?
Audio descriptions narrate important visual content that isn't conveyed through dialogue — such as actions, scene changes, facial expressions, and on-screen text. This helps blind and low-vision users understand the full video.
| WCAG Criterion | Requirement | When Needed |
|---|---|---|
| 1.2.3 (Level A) | Audio description OR full transcript | All prerecorded video |
| 1.2.5 (Level AA) | Audio description required | All prerecorded video if visual info is not described in audio |
Common Video Captioning Mistakes
- ❌ Relying only on auto-captions without editing — Auto-captions can be wildly inaccurate
- ❌ Missing speaker identification — Users can't tell who is speaking
- ❌ No sound effect descriptions — "[applause]", "[door creaks]" help convey context
- ❌ Captions too fast to read — 3-4 seconds minimum per caption chunk
- ❌ No captions for live videos — Live videos need real-time captioning
- ❌ Poor contrast of caption text — White text needs black background/shadow
Free Captioning Tools
- YouTube Auto-Captioning — Free but requires manual review
- Amara.org — Free community captioning platform
- Subtitle Edit — Free open-source caption editor
- Otter.ai — Free tier for transcription
- CapCut — Free video editor with auto-captioning
Legal Requirements — What the ADA Says About Video Captions
⚖️ ADA and Video Accessibility
ADA lawsuits have specifically cited missing video captions as a violation. Courts have ruled that websites without captions discriminate against deaf and hard-of-hearing users.
Key case: National Association of the Deaf v. Netflix (2012) — Established that streaming video must have captions under ADA.
Section 508: Federal agencies must caption all video content.
⚖️ Is Your Website at Risk?
Check if your video content meets ADA captioning requirements. Free scan.
Check ADA Compliance →Internal Links — More Accessibility Resources
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Frequently Asked Questions
Final Thoughts
Video captioning is not optional — it's required by WCAG, ADA, and Section 508. Without captions, you're excluding 466 million people worldwide with hearing loss.
The good news? Adding captions is easier than ever with free tools like YouTube auto-captioning (with manual review), Amara, and Otter.ai. Start with your most important videos first — promotional videos, tutorials, testimonials, and any video that conveys critical information.
🚀 Ensure Your Videos Are Accessible
Run a free ADA compliance scan to check if your website meets captioning requirements.
Scan Your Website →No signup. Instant results. WCAG 2.1 Level AA.
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