They claim their patent is very specific, then list points that amount to 'a camera on the back of the room, with a view of the instructor, and students around the room who aren't blocking the camera'. The supposedly non-infringing examples are silly, too - a bunch of videos with people standing in the way of the instructor. Can they realistically assert that not having students stand in the way, blocking view of the instructor, in an instructional/exercise video is novel, non-trivial, non-obvious and not done before?