It might surprise you that i found this video somewhat eye-opening. I had not heard it before. I do recall hearing part of a radio show with Obama but it was either another interview or a more complete selection from this one. My recollection of it was that it was just Obama droning on in an academic tone about topics he might have covered in his courses. At the time I must have tuned it out before he got to this part. Since i manage to be interested in many hours of C-SPAN I don't know why I would I would not have listened to the whole thing.
I agree that all the talk about "redistributive change" and how awful it was that the Supreme Court did not interpret the Constitution in a way separate from that intended by its authors sounds unbelievably radical for someone who would in a few years be a winning presidential candidate.