Rule: Video-only (Prerecorded)

Rule ID Video 1
Conformance Required
Definition Prerecorded video-only media must have either a text based alternative or an audio description track that presents equivalent information for prerecorded video-only content.
Purpose
  • This Success Criterion helps people who have difficulty perceiving visual content.
  • Assistive technology can read text alternatives aloud, present them visually, or convert them to braille.
  • Alternatives for timed-based media that are text based may help some people who have difficulty understanding the meaning of prerecorded video content.
  • People who are deaf, are hard of hearing, or who are having trouble understanding audio information for any reason can read the text presentation. Research is ongoing regarding automatic translation of text into sign language.
  • People who are deaf-blind can read the text in braille.
  • Additionally, text supports the ability to search for non-text content and to re-purpose content in a variety of ways.
Conformance Required
WCAG Success Criteria

Success Criterion 1.2.1 Audio-only and Video-only (Prerecorded)

Other Related Success Criterion:

Rule Category Audio/Video
Rule Scope Element
Techniques
  • For the video eleemnt use the track element to add audio descriptions to the video content.
  • For object and embed elements use aria-describedby to reference a text description of the video content.
  • Include an audio sound track that describes the video content.
Information Links