Providing AD tracks (when necessary) helps to meet the requirements of WCAG 2.0 AA compliance.An AD track provides information about actions, characters, slide contents, on-screen text, and other visual content to people who are blind or have low vision, as well as those with cognitive limitations who have difficulty interpreting visual elements. An Audio Description (AD) track is a secondary narration track, intended to describe important visual details that cannot be understood from the main video soundtrack alone.
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