Uncomplete starter content?

So I have seen the starter content that there is on unreal, but the one that they make in youtube called “Twin Stick Shooter” Is totatly diferent from the one they have at the starter content, why?
I would like to start with that content, because when I follow the tutorial the code part allways gives me errors.

its because as the engine is updated some of the stater content has changed as the methods to do some things in engine has changed