I think this guy teaches really good, I pretty much learned all the reactions for second semester organic chemistry from this guy. He covers plenty of topics so just look for the ones you're weak at. Organic chemistry is towards the middle of the page.
http://www.freelance-teacher.com/videos.htm
The vids are free and are on YouTube.
http://www.freelance-teacher.com/videos.htm
The vids are free and are on YouTube.