How to create a true first person camera?

Hello Developers,

I was recently working on my game, and I needed to have a true first person camera.
So let me try to reword in-case you didn’t get what I was trying to say.

So, basically I want a camera like Broken Bones 4 has one. Here’s a video to demonstrate.

It’s possible that it’s very easy with some specific property of the camera, but I don’t know yet.

Please respond asap,
OceanTubez

Look this is really important and I’m running out of patience…