Hands, or rather the hand, is a subject that matters to movies shot with handheld cameras : the camera in one hand, that films the other hand.
With mobile phones, filming his feet was a recurring figure, because when turned on the phone, in a horizontal position, we see his feet. On the other hand, with a digital camera that is facing you, it is vertical when it turned on. So often the other hand appears in the image.
This hand can become a topic.