it is really good video you can't ever seen.
it is not same the mainstream lecture.
it is grammar for speaking, not for TOEIC or other grammar test
it's ok you dont have any idea about english
for example 8품사, 분사, 동사, 현재완료 .... etc
it doesn't need any writing or memorizing, just watch
i already have seen all of the lecture so i am recommending to you
if you have trouble about studying grammar, make at least 30 minutes for watching sample video in site upper i linked.
source: 영어공감 사이트