Nalbinding is a precursor to knitting, thousands of years old. Unlike knitting, however, it does not unravel if you pull on a loose end. You’re basically tying lots and lots of knots. So you could cut the fabric in half, and it wouldn’t unravel. (Don’t try that with your knitting or crochet!) All you need to work Nalbinding is a large-eye needle and some yarn. Unlike knitting where you work from the ball of yarn, in nalbinding you cut long lengths of the yarn and thread it through the needle. When you run out, you splice on a new piece.
This video by Petra teaches you how to work a York stitch in the round. You’ll first make a circle, much like starting crochet in the round. Then you’ll work around the circle, adding stitches as you go to increase the diameter. This is how you start hats, caps and bags.