Because this string is a specific "product code" or file name rather than a topic of general academic or historical study, a "proper essay" on the subject would focus on its context within the early 2010s digital media landscape: Digital Media and the "KNZA" Series
Without more details, it's difficult to ascertain the exact nature of this content or its availability. It could be a rare or hard-to-find video, especially if it was released through limited channels or for a specific audience." knza002 korea girl in soul vol 2 2010 05 exclusive
– 1:12 Field recording of rain + distant subway, soft piano chord Because this string is a specific "product code"