In the beginning, the female instructor's part was easy to understand and conveyed the content well, but in the latter half, the male instructor's part was difficult to understand. The speaker spoke too slowly...ㅠ The coding part was not explained in detail, so if you don't know the language in advance, you won't understand at all. There is a PPT for the lecture, but the demonstration was slow and the instructor only briefly flipped through the PPT content towards the end, which was frustrating because it was hard to see in detail. Also, the video sound was too low. I had to turn the volume up to watch, but it was too noisy whenever a sound effect like an error came on.