Why it worked
The video likely performed well due to the satisfying ASMR-like nature of watching squishy toys being deformed and destroyed, combined with the inherent curiosity of seeing if they would survive the "squishing."
Summary
The video shows various squishy toys being squeezed and smashed. First, a pink frog-like squishy is shown being squeezed, and it appears to survive. Then, a macaron-shaped squishy and a cheese-shaped squishy are also squeezed, with the latter appearing to be destroyed.