This package includes a C# script that allows you to use multiple cameras at once.
You can create a GameObject and attach the MultipleCameraFollow script to it.
You can also look at the demo scene.
Camera Prefab - The camera prefab that will be instantiated.
Stretch Axis - The axis you want to stretch the regular cameras along.
Irregular Axis - The axis you want to place the irregular camera (if exists).
Targets - The targets you want to follow with cameras.