Important Hanja Pairs: 上 (상) and 下 (하) (한자) | Korean FAQ
上 (상) and 下 (하) are opposites, but are also used in different ways. I'll cover some of the most common words you'll see them in, as well as show you how you can recognize the meanings of new words that use these characters.
I've only filmed a small handful of these Hanja episodes, but if the response is good I can make more in the future. Thanks for watching~!