Introduction - If you have any usage issues, please Google them yourself
You can follow your game character with your camera via this script. It is very easy to use and the script is very simple to understand.
Attach it to your camera.
Write the tag of your character to the your game object tag part and then run the game. Only, there are few things to do that you should set the following coordinates of the camera on this part: (5,5,-7).