Hi guys, Welcome to the Advanced Video Search Engine, and you are watching [지식iN 20주년] 모두가 지식인이십니다. That video is uploaded by PLAY NAVER at 2022-09-27T17:30:00-07:00. We are promoting this video only for entertainment and educational purpose only. So, I hope you like & enjoy it. [1iYRWZ7d4Ao]