Please use the "search" feature on these forums for Steven Seagal. You'll find more info than you'd ever want, he has been covered ad-nauseum here. As far as other videos, books, etc. check out the "Reviews" section right here on Aikiweb (look to your left at the menu, scroll down if you need to, you'll find sections on book, DVD's and videos) www.budovideos.com
is a good place to start looking for Aikido videos...big selection. Good luck and welcome to Aikiweb.