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WCAGA

1.2.1 Audio-only and Video-only (Prerecorded) — For prerecorded audio-only and prerecorded video-only media, the following are true, except when the audio or video is a media alternative for text and is clearly labeled as such:

WCAG references
  • 1.2.1 Audio-only and Video-only (Prerecorded) (A)

Official methodology to test criterion 1.2.1

Test 1 (1.2.1)

  1. ulist:
    • Prerecorded Audio-only:An alternative for time-based media is provided that presents equivalent information for prerecorded audio-only content.
    • Prerecorded Video-only:Either an alternative for time-based media or an audio track is provided that presents equivalent information for prerecorded video-only content.