For some reason, I couldn't get the video to play. If it's the Martelli Zip Bind system I have do it, and it does work! This is for sewing bindings on by hand and it keeps the sides the same size. I haven't used it in quite awhile because Martelli's also makes Kwik Bind, for applying binding all by machine which is suitable for many of my projects. I also like Ricky Tim's method of binding by machine with a piping added.
I also love the Martelli zip gun which came with my Zip Bind, I use it for a lot of things!