I had heard of the technique but never watched the video. That is cool.
I am tempted to experiment with it. I'll just take a piece of 1/8" elastic and see if it'll crochet like that and then come apart easily. If it seems to work, and if it doesn't take me all day to do it, I just might give it a try. It certainly would seem to (a) make it easier to get the cord into the BT, and (b) reduce the likelihood of the cord getting jammed up in there.
I'll have to experiment with both that *and* the over-under coiling. Good fun stuff to play with.