I still don't really understand even after watching it. I'm not absorbing anything at all. It is difficult to understand the skill system just by listening to this lecture because there isn't enough explanation. I believe it is necessary to provide thorough, step-by-step explanations tailored to the learner's level and to use diagrams where necessary to aid understanding. I think the teaching method needs some improvement. This style of lecturing does not seem to be effective for learning.