Captions provide additional information about what is visible on the screen. This allows video content to be accessible to those with visual impairments.
Transcripts allow individuals who cannot access content from web audio or video to read a text transcript instead.
For people who are visually impaired, described video makes media like TV programs and web videos more accessible. It is the auditory narration of visual content. During gaps in dialogue, it describes visual elements such as scenes, settings, actions, and costumes. If you have a descriptive transcript you don't need to have descriptive video according to The Web Content Accessibility Guidelines (WGAG) unless otherwise requested.
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