Oh, sorry, yeah, that is exactly how it's done. You can do it while braiding or after (it's a little easier, in my opinion, to do it as you make the bracelet). I didn't notice that wasn't shown in the link. Any of the youtube videos should be fine, there's nothing particularly tricky or misleading in the technique to throw you off. Just do the first knot, lay the blue cord on top, continue knotting, lay the blue cord down for the next, up for the one after, repeating until you're done (or tie it up as normal and then glue it to a skewer or tie it to a metal wire, after they're inserted through the links, to pull it through easier).