When the dog is allowed to run loose, you can hang the leash around your shoulder and fasten it so you don't lose it. And the second purpose is to be able to hang a poop bag holder on it.
interesting. but there's a lot of video that you could/should cut out. i just forwarded through most of it. once i saw 1-2 examples of wrapping it around the handle, i didn't need to see you do every. single. wrap. for. the. full. 10. cm.