Panathinaikos22 -14 Junior Poster

Hello,

How cameras works in games? i should add cameras in every object in game?
I tryed add camera only in player and follow player but i have problem with other objects, other objects dont change in screen.
I mean when i press UP key to move player the player is moving and camera is following him but i dont see that, other objects still in same place

the only i see is ball to zoom-out