My HUSBAND showed me this KNIFE trick!

The video likely worked due to its surprising and unconventional "hack" that is visually engaging and easy to understand, even without spoken commentary. The use of a common household item (a mug) in an unexpected way creates curiosity and shareability.

The video demonstrates a "knife trick" where butter is scraped from the bottom of a mug using a knife, and then what appears to be salt or sugar is sprinkled onto the butter. The knife is then used to scrape the butter and salt mixture off the mug, and finally, the knife is wiped clean on a paper towel.