Why it worked
The video uses a highly aesthetic, low-friction 'swatch' format that provides immediate visual gratification for a specific seasonal trend, making it highly shareable and saveable for beauty enthusiasts.
Product placement
MAC Cosmetics (a) ACTS: The creator displays three specific MAC products (a lip liner, a lipstick, and a lip gloss) and applies them to her hand to demonstrate the color and texture of a 'lip combo'. The products are clearly branded and the video is a direct recommendation of these specific items. Removing the brand names would change the video from a product-specific recommendation to a generic one.