Another youtube channel I found that teaches Japanese in Korean is Hotena 하테나닷컴. It is quite useful and interesting to be able to use Korean whilst learning Japanese as an extra for revision. I will most probably continue taking the non-specialist Japanese module at University, so I’ve started revising Japanese as well as Korean. My main focus right now is vocabulary and kanji/hanja for both. I’m also writing grammar notes from intermediate (Korean) for practice.