University of California, Berkeley: Dr. Hubert Dreyfus' "Heidegger: Lecture 15"
Listen to lecture 15. As Heidegger attempted to revolutionize philosophy, he also tried to re-define some of its most important concepts, such as the idea of understanding. Pay close attention to the way in which Heidegger does this. As you listen to this lecture, note the distinction that Dr. Dreyfus makes between primordial understanding and basic understanding.
Click https://archive.org/details/Philosophy_185_Fall_2007_UC_Berkeley link to open resource.