The only value lectures have for me that a textbook doesn't, is being able to ask the professor questions when I can't follow something (in a live lecture). I t

The only value lectures have for me that a textbook doesn't, is being able to ask the professor questions when I can't follow something (in a live lecture). I typically get way more out of a well-written textbook than a well-constructed video lecture. That being said, if the MOOCs would integrate a feature into their video players to emulate 'raising your hand' (for example if you have a question at a certain point, you can click a button and other questions that have been asked and answered at that or nearby points would appear, with stackoverflow-like voting on questions and answers, and the ability to chain your question to that point in the video if it wasn't already answered) it would make their video lectures even MORE useful than traditional classroom lectures and perhaps on par with textbooks.