Why it worked
The video leverages a common beauty concern (dark/bright under eyes) and presents a clear, time-lapsed solution using a specific product. The "Day X" progression creates a sense of progress and efficacy, encouraging viewers to try the product themselves.
Summary
The video shows a 7-day progression of applying numbuzin eye cream to the under-eye area. The creator applies the product daily, highlighting the "Day" number each time, suggesting a before-and-after comparison over a week.