Changes

Accessibility for Web audio & video is an interesting beast. It is mainly referred as a need of extending content with functionality to allow [http://www.w3.org/WAI/EO/Drafts/PWD-Use-Web/ people of varying disabilities] (in particular deaf / blind) access to Web content.

* An alternative is to enable the inclusion of a hyperlink for a fragment of time and display in some special way that a hyperlink is present. (see e.g. [http://annodex.net/TR/draft-pfeiffer-cmml-03.html#anchor48 CMML] for an example)