I have no opinion on the need being adequately covered by other attributes, but…
On Sun, Aug 9, 2009 at 11:05 PM, Remco<[email protected]> wrote: > For an image this usually works well. An image usually doesn't convey > a lot of meaning. It can be replaced by a simple sentence like "A > young dog plays with a red ball on the grass.". > > For video, audio, object, iframe, this is a little sparse. Shortening [snip] For some videos a simple textual description is inadequate, just like it is a poor proxy for some still images. Yet for some other videos, it is completely accurate. I have no problem imagining a short video clip which fits your "A young dog plays with a red ball on the grass" just as accurately as a still image could fit that description. An argument that an attribute is inadequate to cover *all* cases shouldn't be used as a reason to exclude something which is useful in many case.
