This is my first time leaving one star. There were a lot of mistakes here and there, and it felt like you were just chatting with a friend rather than recording a lecture to explain. For example, you explained something like, "The reason why implement is used is to catch typos in TypeScript." Of course, it's not a wrong explanation, but I wish you had explained it more accurately since it's a paid lecture and more object-oriented. I read the Node.js textbook you wrote and found it informative, so I had high expectations for the lecture, but it was disappointing.