Audio Description (Prerecorded)

Understanding WCAG2.0

Applying "voice commentary" required in 1.2.3 to all the synchronized media present on the page. At this level we do not ask for audio description on live video.

Principle Perceivable Information and user interface components must be presentable to users in ways they can perceive.
Guideline Time-based Media Provide alternatives for time-based media.
Criterion Audio Description (Prerecorded)
(1.2.5 AA)
Audio commentary is provided for all recorded video contents included in synchronized media.

URL of Techniques for WCAG 2.0