Why it worked
The video leverages the novelty of a new product release (new Mars bar flavors) and the affordability associated with a discount retailer like B&M, appealing to impulse purchases and snack enthusiasts.
Summary
The video shows new Mars chocolate bars, specifically Salted Caramel and Cookie Dough flavors, being displayed and picked up in a B&M store. The on-screen text highlights that these are new arrivals at B&M.