Đưa cái phức tạp về cái đã biết

I’m not sure which bit of the video you’re referring to. Possibly the quiz just after 4:40. I think the ideas here of stopping white forming an eye at R2 and reducing eye space should be familiar. And it turns out the order doesn’t matter here. I’m not sure there’s really more to go through. Although he is assuming you’ll do some work yourself to internalize it.

The video does run through the two vital points of the L+1 group rather quickly, probably because it’s revision from Vadim’s course. For the **S**trong S-shaped L+1 group, jump to the often-key 1,2 point on the first line. For the other weaker group, stay close, making eye-shape with the 2-2 point. I found this video helpful, as it added the idea of considering these same vital points first when one of these L+1 shapes is there, but with more mess. Without this tip, I’d often be trying more points before finding the answer.