|Live and prerecorded video with synchronized audio (i.e. a movie, lecture) using the
video element must have synchronized captions.
- Synchronized captions provide a means for people who cannot hear the audio content of a video to understand the audio content of the video.
- Some types of learning disabilities affect auditory processing, captions provide an alternative way to understand the audio content of a video.
- This rule covers the requirements of both WCAG 2.0 Success Criteria 1.2.2 and 1.2.4, and therefore covers both live and prerecorded video content.
HTML4 Legacy Techniques
HTML5 and ARIA Techniques
|WCAG Success Criteria
1.2.2 Captions (Prerecorded) (Level A, Primary Success Criterion)
- Use the
track element to add a caption track to the video content.
- Use open captions to include the captions as part of the video.
- If closed captions are not support, use open captioning to include captions as part of the video.
- Open captioning is the only way to insure that captions are available on most cells phones and tablet computers connecting through wireless services.
- When captions are enabled on the media player, verify the captions are visible.
- Verify that the captions accurately represent and are synchronized with the speech and sounds in the video.