What is added by having a small face in the corner of the screen that partially blocks the actual content of the video? Like with straws it’s to help people with grip strength or with unsteady hands to be able to drink water so what do you actually gain from the persons face? I am not trying to be attacking but just trying to understand

The minimum critical mass of plutonium is around 20 pounds which is not unreasonable and being denser than lead is actually good since it allows it to be very compact