[Bug 12794] <video> Add a non-normative note on how to provide text alternatives for media elements

https://www.w3.org/Bugs/Public/show_bug.cgi?id=12794

--- Comment #8 from Silvia Pfeiffer <silviapfeiffer1@gmail.com> 2011-12-12 05:06:44 UTC ---
(In reply to comment #7)
> Why do authors need anything other than just regular markup? To take your
> example:
> 
>   <h1>A Clockwork Orange Trailer</h1>
>   <video src="file.mp4" poster="poster.png"></video>
>   <p><a href="file.mp4">Download the video file</a>.
>   <a href="transcript.html">Veiw the transcript</a>.</p>

That's certainly possible, and if @aria-describedby attribute was added to the
video that linked to the transcript, that would allow screenreaders to announce
it early, too. But that doesn't help in cases where the video is not supposed
to have other markup about it around it, such as when it's "embedded" in
another page through an iframe. This is why I suggested moving the extra
content into the video element as fallback content. If that fallback content
was available to accessibility APIs, then it would be the nicest way to have
accessibility content that can be copied around with the video.


> Can you point me to some existing sites to show how they handle this today?
> e.g. how does YouTube handle this?

YouTube doesn't have a means to expose transcripts to embedded videos right
now. This is actually a drawback with YouTube videos and users are trying to
fix it by cutting and pasting he whole transcript into the "description"
section. However, that is lost when YouTube videos are embedded.

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Received on Monday, 12 December 2011 05:08:46 UTC