Class keyword in member declaration

Actually it isn’t. I just found this line in a Youtube video and did not understand what it means. In other languages like Object Pascal for instance, it would mean a public class member pointer (or static member), but I guess it is something different in C++.

If you could tell me the name of this C++ language resource I could look for it in Google. So far I have found only things like common class declarations or instance pointers, which I already know.

Thank you for your answer anyway,