I am trying to understand what happens when there is an audience. And I have discovered that some of these long videos get good traffic. The rule of thumb for videos is 3 minute, which I never do. I am thinking, that some longer videos very comprehensive in nature may be more helpful than separate into small videos. More or less one stop shopping on advice. I am thinking about making long videos on some more complicated topics, and if anyone wants to suggest a long topic, then I am open to ideas.