Why it worked
This video likely performed well due to nostalgia for the game Friday Night Funkin' and its characters, particularly Garcello. The "taste of 2021" framing taps into a desire to revisit popular content from the past, and the "SICK!" text adds an element of excitement and engagement common in gaming content.
Summary
The video shows gameplay from the rhythm game Friday Night Funkin', specifically focusing on a character named Garcello. The gameplay is presented with on-screen text that reads "taste of 2021 FNF Prime" and "SICK!".