Taking pictures/videos from both front and rear camera simultaneously?

There are apps that can do this but they are not exactly Bothie. The app allows the user first to take a picture from the rear camera and then from the front camera (but not simultaneously). Nokia first came up with this idea in 2017. More about Bothie I am just wondering if this is a hardware feature or software. I can handle the software issue(with root) i think. And if this is not possible then can you please explain why and how it works (totally optional)? If this is possible then people will be able to take videos from both cameras (the poor cameraman will also be included in the clip).. and that would be pretty cool IMO =) Every little opinion or googling is accepted. Thanks in advance :)