is it really waterproof?

The video uses a common, relatable challenge (testing waterproof mascara) and presents it in a visually engaging and slightly dramatic way by submerging the face in water. The clear demonstration and positive outcome, combined with the "paid partnership" disclosure, effectively showcase the product's performance.

The creator tests the waterproof capabilities of L'Oréal Paris Extentionist Mascara by submerging their face in water. The mascara appears to hold up well, with no smudging and lashes remaining curled.