Basics: "Yarn over" (yo) is correct. Grabbing the yarn from "under" is incorrect. She even has a video on this page to demonstrate the correct and incorrect way for right handed and left handed crocheters!
Narcissus Lace-tunisian-stitch Step Insert hook in chain from hook; yarn over, draw up a loop Repeat Step 1 across row, keeping all loops on your hook.} Step Yarn over, draw through 2 loops on your hook; *chain draw through 5 loops on your hook