An alternative for time-based media or audio description of the prerecorded video content is provided for synchronized media, except when the media is a media alternative for text and is clearly labeled as such.
Checklist – Components
Video – Recordings
WCAG 1.2.3, 1.2.5, and 1.2.8 overlap, so that you can chose the minimum conformance level for your situation. In other words…
- If you want to comply at the A level, use 1.2.3 Audio Description or Media Alternative (Prerecorded) – Level A, and choose between an audio description or a full-text alternative.
- If you want to comply at the AA level, use 1.2.5 Audio Description (Prerecorded) – Level AA, which requires the audio description track.
- If you want to comply at the AAA level, use 1.2.8 Media Alternative (Prerecorded) – Level AAA, which requires both the audio description and the full-text alternative.