Why it worked
The video taps into the ASMR and oddy satisfying trends by showing a tactile, visually interesting process of creating a homemade product. The use of common household items and the transformation into a solid form are key elements that likely drove engagement.
Summary
The video shows a person making "Foca" (likely a homemade laundry product) by mixing laundry detergent powders and a liquid optical brightener. The ingredients are combined, mixed, and then left to set for 48 hours, after which the resulting solid blocks are broken apart and shown to be crumbly.