The lecture content is good. However, when they show a laser pointer in the lecture, I can't tell where it's pointing, and the content to be shown on the PPT screen is blurry, so I understand that they overlapped it with a new file, but the text is too small to see, and these parts are just annoying. And I don't know why the first part of the lecture always keeps cutting off. Everything else is fine. I don't know if it's intentional, but did they really have to include a scene where they're focusing on the instructor? I don't understand why they edit it to zoom in on the instructor's face and upper body when the instructor is pointing and explaining somewhere. I don't even want to know... It would be better to film the entire thing, but when they're explaining or pointing, zoom in on the part they're pointing at a bit more.