I can’t see the video but by the description I imagine you are trying to create 4 viewports with views of different points of your object.
If it is that easy to pull, just adjust the line of each of the 4 cameras with normalized values.
To test create an empty Gameobject and 4 cameras inside it, a script to manipulate these cameras and adjust their tracks, something like:
public class CameraControl : MonoBehaviour {
    public Camera[] cameras;
    // Use this for initialization
    void Start () {
        cameras[0].rect = new Rect( 0.0f, 0.0f, 0.5f, 0.5f );
        cameras[1].rect = new Rect( 0.5f, 0.0f, 1.0f, 0.5f );
        cameras[2].rect = new Rect( 0.0f, 0.5f , 0.5f, 1.0f );
        cameras[3].rect = new Rect( 0.5f, 0.5f, 1.0f, 1.0f );
    }
}
Drag this script to the camera parent Gameobject.
Include an object in the scene and position the cameras as you want them to show your object (in 4 different positions and angles).
Run the game and make sure it’s +- this ;)
							
							
						 
I ended up solving it differently, I changed the image and adjusted it to simulate the video.
– HDeiro
https://www.youtube.com/watch?v=Y60mfBvXCj8 A video similar to the one I posted.
– HDeiro