I wrote a book on the basics of wet plate collodion photography back in 1995. Since then it's been updated twice. It's not fancy...but most people consider it well written and very helpful. My wife and I also published The Collodion Journal from 1995-2001. We continue to teach group workshops and tutorials here in the US and all over the world. No videos though. :-)

Mark Osterman
George Eastman House