[Bug 10642] No alternative text description for video key frame (poster)

http://www.w3.org/Bugs/Public/show_bug.cgi?id=10642

Aaron Cannon <cannona@fireantproductions.com> changed:

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--- Comment #30 from Aaron Cannon <cannona@fireantproductions.com> 2010-10-01 14:32:53 UTC ---
This seems quite simple to me.  Is it that hard to imagine that there could
ever be an instance where a description of the key frame would be useful to a
blind user?  I can point to dozens of examples where the alt attribute is not
useful or necessary.  Does that mean that alt attributes are never useful? 
Certainly not.

Here's a contrived, but plausible example of where such alternative text could
be useful:
Say my daughter's school puts up a page of videos from their recent sports
fair.  On the page, they have several videos from the various events.  I think
my daughter might be in one of them, but I'm not sure which one.  Fortunately,
while the titles are appropriate: "500 yard dash", "jump rope marathon",
"push-up competition", ETC., they don't provide the information I need. 
Fortunately, one of the key frames happens to show my daughter.  If there were
appropriate alt text on that key frame, it might say, "Jennifer, Emma,
Alejandra, and Nicky jumping rope."  Without that alternative text, this
information might otherwise be unavailable to me.

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Received on Friday, 1 October 2010 14:32:59 UTC