It's really... like a college lecture...!! Oh, it's a great lecture that you can take for free without paying tuition... Even though I'm not good with computers, I was able to follow along well. Since they give frequent annotations, I can quickly catch up even if I miss something in the middle! Even though I'm not good with computers, 1.5x speed was just right for me. But still... like a college lecture... What I mean is that it doesn't feel like elementary, middle, or high school teachers thoroughly plan out lessons and divide up their time to teach. Of course, it's natural since the professor doesn't have to complete a teacher training course. I felt distracted because he kept going back and forth between the settings screen and seemed flustered in the middle. However, I didn't lower my rating because I felt that it wasn't a fatal flaw and people who have taken college lectures would just think, "Oh, you're a professor..." and move on! +) Edit... I wanted to talk about the advantages as much as possible. I was afraid of sounding like a young man... But... ..... After listening to 40 lectures, my evaluation had to change. I prepared for the class... a lot... . I feel embarrassed because it seems like you don't do that (you prepare a lot of examples, but you don't prepare how to convey them). I'm currently listening at 2.0x speed... The class keeps getting longer, you keep rambling on and on, there are often bugs in your code, and above all, you often get stuck, and the silence is just too hard to bear. I understand that you want to emphasize that the languages you mainly use are Java or C, but if you keep talking about other languages when giving a Python lecture, beginners will lose trust in you and the content will get confusing.