Accessible multimedia

• Best practices for online captioning
  Joe Clark has written 21 chapters on the topic of best practices in online captioning. Among many other things, you'll find: alist of every known method of using embed and/or object with valid code; illustrated examples; a host of guidelines on how to handle exceptional cases (how do you caption a videoclip that's also audio-described?).
  (Joe Clark, Joe Clark.org)

• Flash and accessibility
  "With the release of Flash MX and Flash Player 6, Macromedia demonstrated a clear ongoing commitment to accessibility that has been widely acknowledged and praised by many people working in the area of disability support. A number of significant issues however, remain unresolved."
  (Roger Hudson, Web Usability)

• Flash MX accessibility issues
  When usability expert Jakob Nielsen proclaimed Flash was 99 percent bad, he was right on at least one account: accessibility. Until the release of Flash MX and the Flash 6 player, about 41 million disabled web users could not take full advantage of Flash web sites (According to World Bank in 2000). Even with Macromedia's move to support Section 508 guidelines, the government's plan for web accessibility, the majority of Flash developers have not adopted the necessary best practices.
  (Jason Michael Perry, O'Reilly Network)

• Making Flash usable for users with disabilities
  Jakob Nielsen advises that Flash designs are easier for users with disabilities to use when designers combine visual and textual presentations, minimise incessant movement, decrease spacing between related objects, and simplify features.
  (Jakob Nielsen, Alertbox)