Consejos para que el audio y el vídeo sea accesible

En Making Audio and Video Media Accessible del W3C se explica cómo crear contenido multimedia accesible:

Accessible audio and video is essential for people with disabilities, and benefits organizations. Depending on the content of your media, it might need captions/subtitles (a text version of the audio that is shown synchronized in the media player), a transcript (a separate text version of the audio), audio description of visual information (usually an additional audio stream that describes important visual content), or other accessibility functionality/features.