Samsung has confirmed the existence of a new smartphone with not one, not two, but three rear-facing cameras. Surprise, surprise; it's not the Galaxy S10 - and normal people will be able to afford it.

In the digital age of smartphones and instant messaging, it has never been easier to record and send videos and conversations involving other people. App features such as Instastory and Snapchat’s instantaneous video messaging abilities allow users to share real-time events and conversations to their friends and the public.

In many cases these secret videos spark significant public interest by providing a fly-on-the-wall perspective to an unusual event or crime. But is any of this legal? Let's find out.