Robert_Charlton - 6:13 am on Jul 28, 2010 (gmt 0)

This Google article contains guidelines, specifications, and sample code....

Creating a Video Sitemap [google.com]
Google webmaster central

Here's a WebmasterWorld discussion on the topic with more reference links....

Google Video Sitemaps - Anyone have experience with these?
http://www.webmasterworld.com/google/3590214.htm [webmasterworld.com]

Site search and Google, btw, will help a lot in your research. ;)