The issue comes up often to most webmasters about how to properly add video and audio to web pages.

The following links provide most descriptive definition..

http://www.webstandards.org/2006/08/...object-markup/
Valid Flash
Valid Video
Valid Audio

The pages above should provide enough information to for you to add media to your web pages, but if for any reason there are more questions, let's try to keep them here in this thread so we can have everything in one place and provide what will hopefully be a valuable resource.