I had Walmart's DVD club (I think it is part of Netflix now) and cancelled it because I found I could get any movie I wanted through our public library system for free or, if I couldn't get it from our library, they'd "interlibrary loan" me one for a buck!
'Course, there's a bit of a wait, sometimes...but heavens! It's free! (Well, our taxes pay for it.)
Our library has some of the Teaching Company videos. They are really good, but mainly for high school and college level courses.