Create a blueprint extended from Actor, add a spring arm and camera component to that. Now this blueprint will be the object your characters will pickup.
Now I suppose you only need to use this camera when it is actually picked up by one of your characters.
So when the item is picked-up, use the ‘Set View Target with Blend’ node to change to the Actor’s camera (you will need to get a reference to the camera component and pass it as input to the node)
But if you want to see through this camera all the time, do athe above stuff in the BeginPlay event of your Pickup Actor.