I found a program called

I found a program called Kinovea. It's an free open source program used traditionally for sports analysis. I think its fitting for what I'm doing. From what I see you can add comments on key frames. There's a feature to compare two video as well which seems useful for what I am trying to do. I have yet to try out the softare but here's the website for anyone who is interested in downloading it:

http://www.kinovea.org/