A spin the wheel video is a short clip of a wheel of choices being spun until a pointer stops on one of them: a prize, a dare, a dinner, a name, a topic for the next video. Creators use it to make a decision part of the show, to reveal a giveaway result, or to hand a choice to chance on camera.
In this maker the wheel lands where you tell it to. You type 2 to 12 slices and choose the winner, and the spin is worked out backwards from that slice: it's thrown, runs for a few turns, slows down with the pointer ticking over the pegs and stops on your slice. Then the other slices dim, the winner lifts out and its name appears under the wheel.
If you need a fair pick, draw the result first with a method your audience trusts, then set that slice as the winner here. The video shows the outcome you already have; it doesn't choose one.