I've wanted to create such a site for many years now. My focus is on community college level mathematics. My goal is to make it topic based. My college's adm

I've wanted to create such a site for many years now. My focus is on community college level mathematics. My goal is to make it topic based. My college's administration is a bit conservative when it comes to new ideas. I think you are wrong about not having enough videos though. More and more college faculty are creating their own videos. What is lacking is a central storage location for these videos. I think people would be willing to upload their videos and make them publicly available. I could, over time, what evolves is a book. In math this would work because at the beginning levels the knowledge is static. How to factor trinomials is not ever going to change. I think a Stackoverflow site would work for lecture videos.