I'm not sure about any DVDs to purchase. Maybe check your library-I once rented a couple of video tapes from there for physiology and organic...they were alright.
I would suggest getting Chad's Organic and Gchem videos. They are online and you can pay for a month or two month subscription(1 month-$20). Very helpful! http://www.coursesaver.com/vbtube.php?do=list
There is also Khan's academy...I really haven't spent a whole lot of time on here, but watched a couple of videos. They are just a little too long for my taste... Hope this helps! http://www.khanacademy.org/