Why it worked
This video likely worked because it provided a simple, satisfying visual solution to a common problem (getting the last bit of peanut butter out of a jar). The question posed in the on-screen text directly addresses a viewer's potential curiosity, making the demonstration more engaging.
Summary
The video shows a person using a metal tool to scrape peanut butter out of a jar. The tool has a curved end and a flat scraping edge, and it is being used to extract the remaining peanut butter from the sides and bottom of the jar.