http://www.eschoolnews.com/resources/reports/video/index.cfm
This is a good resource to help you use video to improve instruction, the editors of eSchool News have compiled this one-stop source for expert advice and key intelligence.

Made possible by the generous support of TechSmith, this online toolkit features an extensive collection of stories and articles from the eSchool News archives, as well as links to outside resources-all carefully chosen to show you the possibilities of integrating video into instruction.