Why it worked
This video likely performed well due to its satisfying ASMR-like visuals of drink preparation, the popular "dupe" or "hack" trend of making coffee shop drinks at home, and the use of recognizable brands like Starbucks, Girl Scouts, and Chobani.
Summary
The creator makes an iced coffee by filling a Starbucks cup with ice, pouring in coffee, adding Girl Scouts Coconut Caramel Sugar Free Syrup, and then Chobani Confetti Birthday Cake Coffee Creamer. The drink is then shaken and presented.