Nikita Dragun applies her highlighter in a very specific way: At around 3:13, she says focuses the product on the highest point of her cheekbones, before blending upward and downward for the diffused look you see in her Instagram photos.
After applying highlighter on her nose with her fingertip, she takes a bronzer and draws a line just above the tip of her nose. She said this trick makes "the point and tip of your nose stick upward."