Yes, Professor Widom was incredible in terms of teaching concepts clearly. But it's very difficult for anyone to produce such an enthusiasm to a passive camera

Yes, Professor Widom was incredible in terms of teaching concepts clearly. But it's very difficult for anyone to produce such an enthusiasm to a passive camera as one would in a live classroom full of students. What I am complaining is not about the quality of the knowledge they impart, but about the passion and enthusiasm that they just can't impart to a student viewing these videos. But again, there are professors in these courses (In this particular course the Prof. teaches as if someone is listening to him http://www.udacity.com/overview/Course/cs262/CourseRev/apr2012 http://www.udacity.com/overview/Course/cs262/CourseRev/apr20...) who put a lot of effort, to produce an awe of surprise for instance when they arrive at something imp, like in a class-room. But this is an exception and can't be applied to every professor. So I think there should be an improvement someway in this regard.