Here are five easy words/phrases you can learn from this video. Watch the subs for more vocabulary :)
머릿속에 (meori sok-e) - In your/my head
장미 (jang-mi) - Rose
아무도 모르게 (amu-do moreu-ke) - No one knows
고민 (go-min) - worries
갈까 말까 (kal-kka mal-kka) - Should I or shouldn't I go?!
If you have any more questions feel free to ask me!