[whatwg] Alt attribute for <video> and <audio>

[Benjamin Hawkes-Lewis]

On 10/08/2009 02:22, Silvia Pfeiffer wrote:
> E.g. when you tab onto a<video>  element, the "alt" tag could give a
> very brief summary as to what the video is about, e.g. "Elephant
> Dreams video".

Don't the following already do that:

1. <video title="Elephant Dreams video" ...

2. <h3 id="elephants">Elephant Dreams video</h3><video 
aria-labelledby="elephants" ...

3. <video aria-label="Elephant Dreams video" ...

What would "alt" add here?

--
Benjamin Hawkes-Lewis