Ian said "Why would you (a blind user) want to know what the poster frame is? How does it affect you?"
That is NOT questioning an assumption. He seems to imply that blind users have no use for an information that is interesting to other people.
That is NOT questioning an assumption. He seems to imply that blind users have no use for an information that is interesting to other people.
Would you be interested in description of image representing video if you could get description of the actual video?
— I watched a funny video!
— Cool! What was on the poster image?
Poster images for videos are also part of journalistic publications, where the poster also works as a still image and conveys meaning or illustrates a point of the story.
> The image given by the poster attribute, the poster frame, is intended to be a representative frame of the video (typically one of the first non-blank frames) that gives the user an idea of what the video is like. (http://www.whatwg.org/specs/web-apps/current-work/multipage/...)