If you are looking for a general overview of how to add different camera states to animations, Unity and Cinemachine have you covered!
Begin by adding a State Driven camera to your scene.
I add a few more cameras bringing my total for this example to four.
Here is the idle camera.
This running camera has a good amount of perlin noise camera shake.
The aiming camera is a standard 3rd person camera, looking over the right shoulder of the Player.
The on death camera is an orbital camera with an overhead Look At and Follow of the player. I don’t have an on death animation setup here yet, but if you have one, you can trigger it with your Death state animation assignment.