The Point of a Crucial Test

An overwhelming majority of people only listen to me, they don't watch me. I'm just going to record audio only for the remainder of this with the exception that there are a few images to come. David provides them in the book, and I want to show you those images, so that'll be important. But for now, I'm just switching to audio only. Now to my ear, this sounds better, and it's also rather easier for me to edit. However, if I get feedback to say that people would prefer the video, then I will continue to do that.