I watched it all in 6 hours. I'll leave an honest review. What are the advantages of this lecture? 1. It's free. 2. It explains the basic concepts in detail. 3. It's recommended for those who have never been exposed to programming before. Disadvantages The lecture time is too long. Currently, professional lecture sites such as civil service or college entrance exam sites try to shorten the lecture time somehow. In addition, they edit the video by deleting the parts that are too long. I hope that there will be improvements in those areas. Review It is suitable only for those who really don't know anything about programming. If you know concepts such as data types, loops, classes, and object orientation through other languages such as C or Python, I recommend that you find a shorter and more compact lecture than this lecture. This is because it explains such parts in detail, so it's not suitable for complete beginners, and those who have already experienced such concepts once may find it very boring.