Anything that takes your attention away from the task of driving is unsafe.
Do you think a "picture in picture" of a dash cam, like the image below has any effect on driving safety?
As per my reply in your duplicate post, I agree (with DarquePervert).
Besides, most Victorian drivers think roundabouts are "give way to the right".
IMO if they can't even get something as simple as that correct, they have no hope of correlating extra (visual) information.