높이 들어라 《ㅌ.ㄷ》의 기발 - Hold high the banner of the DIU - Subtitles
Channel: Communist Communications
Date: 17/10/2019

The Down With Imperialism Union (Korean 《타도제국주의 동맹》) was an organization founded by comrade Kim Il Sung in 1926 (he was 14 years old then). It fought against the Japanese imperialist occupation and for a new, socialist state of Korea.
Video from DPRK Today, I made the English subtitles.
Unfortunately, I have no information on when this song was written, would be interesting to know.