Haven't seen this one posted here yet, but The Art of the Problem is insanely good. (https://www.youtube.com/user/ArtOfTheProblem https://www.youtube.com/user/A

Haven't seen this one posted here yet, but The Art of the Problem is insanely good. (https://www.youtube.com/user/ArtOfTheProblem https://www.youtube.com/user/ArtOfTheProblem) Great focus on the fundamental questions of Computer Science.