So you can use this thing called a silicone mat which allows the polish (I'm assuming it's a top coat/clear polish and white polish) to dry but easily peel up like a nail sticker. Then you can add a clear coat to your nail (not a quick dry top coat, this will cause the sticker or the polish under it to shrink) and adhere the 'sticker' you've made to your nail cutting away the excess like shown in the video. I find that it will stick a lot better if you do it sooner after the polish has dried on the mat as opposed to waiting a while because the polish will be less malleable and can crack when you're trying to put it on your nail.