Apply base coat.
Paint your nails one or two coats with one of your polishes.
Paint normally, just leaving the edges of the first color, letting it show around. You can do it so you can only see the first color by your cuticle, and not show the sides too.
Nail in the video.
You can also do it like this, the second color covering the sides and only have the first color showing near your cuticle.
Take a q-tip or small brush and clean up around your nails. Then add topcoat.
You can actually add another color, or do the first again. You can make it a double ruffian/reverse French mani. And you can so whatever colors you like. I did one with silver and light blue.
I did these a few months ago.
My original pics for this guide.
Hope they turned out great!