It may be hard to tell in the video, but the bowls are lined up with the meditation when Jesse calls for focus on certain chakras and energy centers. This was our second meditation together, so we're still learning each others rhythm to synchronize the experience and make it more fluid.
P.S. I am the bowl guy ;) :P
RE: Crystal Singing Bowl Guided Meditation - 30min - Unity Open Heart Center, Grants Pass, Oregon