http://www.youtube.com/watch?v=vjxM0RdyCcA I made that video to show people how to reach the page of youtube where you can send in your suggestions and one of them happens to be about the 10 minute time limit which I know alot of people would like to get that changed.
You should possibly try entering the video contest that is taking place right now on the site, you can win 100forum cash and a lot of nps, to do what u like doing.