Video accessibility covers several distinct elements working together: closed captions for people who are deaf or hard of hearing, audio description narrating important visual information for people who are blind or have low vision, a full transcript for people who prefer or need text, and a video player itself that is fully operable by keyboard.
Auto-generated captions are a common starting point but frequently contain errors serious enough to change meaning, which is why professionally reviewed or human-edited captions are considered the standard for any video content an organization is legally or reputationally accountable for.