Great video, Watcher. So easy, even Razor could do it (maby).
I have found that it is best to pull the cobra knots as tight as you can when you are making the bracelet. It will soften up a bit as you wear it.
You can also start with a lanyard knot then leave two loops at the far end when you start the weave. This has worked for me - just push the lanyard knot through the loops to secure the bracelet.
If instead of keeping the same strand on top and bottom, if you switch them each time, you get an interesting spiral pattern.