I'm teaching high school film now at a Christian Homeschool hybrid. I was getting ready to teach this concept and thought hey, I wonder if anyone has made a video about it. And I was surprised to find this by my old friend! Really great video! I'll be using it for all my directing classes! I'll check out your other content and see if anything else is relevant.
Nice Video, checking the date of creation, Have you checked out "SHOT DESIGNER" Free full version. For Android, PC, iOS. It does everything you speak of and then some, Includes animating objects, all over head views even allows collaboration.
Yes, this is something that should be done for every scene. There is no global shortcut that covers the whole movie. If you are going to use overhead maps I recommend mapping out every movement that happens in your movie. (Cameras and Actors)