Every behind the scenes photo/video I see shows a fixed setup for both cameras. Is this how it should be or it is like this because of the technical difficulties?
For example, assume that we are firing a laser from our eyes. Wherever we look, we will see that those lasers are intersecting. They will intersect at a closer point if we are looking to a very close point which is centred between our eyes (straight on the nose line).
If we apply this logic to shooting with a camera for a photo or video, shouldn't we actually rotate these cameras according to the subject that we have focus on?