Keep up the great work. I like how you upgraded your lighting and have the promotional shirt in your newer videos. I can imagine how much time it takes you to make these. You have to plan the lecture, conceptualize how to write out the lecture on the board so it fits, write out the actual lecture on the board, memorize what you are going to say, and then begin recording and re-recording until you get it all in one go! It's very impressive that you do it all in one go! Once again, it has been very useful, so thanks!
