I think it would have been a lecture that could have been given almost full marks if it was around 30,000~40,000 won. The video and content are well organized and the explanations are good. I will list down some of the regrettable points. - The latter part of the lecture is not bad, but the video quality is not as good as the first part in terms of visibility. - The lecture materials are poor. The lecture content is hardly organized. This is a big regret. It could be because I personally value documentation. In any case, I think it would be better to think that there is no lecture material.