Why it worked
The video taps into the popular trend of "secret menu" or customized Starbucks drinks, appealing to a niche audience interested in healthier or "high protein" versions of popular beverages. The visual appeal of the colorful drink and the step-by-step instructions make it easily digestible and shareable.
Summary
A barista demonstrates how to make a "high protein Unicorn Frap" at Starbucks. The process involves blending milk, mango syrup, a base, ice, and blue powder, then assembling it with strawberry puree and whipped cream, and topping it with more blue powder.