Does he ever get to the point? I'm 7 minutes in and I haven't heard anything but basics yet.
Edit: 15 minutes and he still hasn't convinced me, or presented any information that I wasn't already familiar with. I get that the bobbins don't need to spin, but I'm not trying to make them spin, I'm trying to clean crud out of the gap. A couple of twists with a socket wrench will do it... (I'm with him that spinning them with a drill is stupid).
Well, it ran out in the background while I typed this and he still hasn't convinced me, but make up your own mind... I mean, he's wearing a riding jacket to make his video, so obviously he knows what he's talking about.