How to make shared local camera?(blueprint)

Hi, I am trying to make a shared camera for my two characters in the game, I want the camera able to zoom or expand basic on the movement of the character, I have searched up the video on youtube but they are all for 4 people. Hope someone can help me with it. I found a document online which is probably the thing that I need but I do not know how to write that blueprint. Hope someone can help me with it. The link URL is down below.