I'm not sure what it is you need help with. My Volume 2 videos only go to Video 17, so I can't see the place you are saying you want help with. I don't have a video 18 in Volume 2. What is it that Ken says about bridging the voice that you need help with?
I did look at Volume One, video 23 "Diaphragm B" where Ken demonstrates diaphragmatic breathing.
Help me with a little more detail about your specific question, please.