Looking for FPS Camera tutorial

Hello, I'm looking for a tutorial that can teach me how to implement directing camera movement with mouse, like in the FPS games. The FPS tutorial videos I found all have a already-made script, but I'm interested in learning how to write one. Step by step video tutorial would be the best, thanks!

 

OpenGL Development Cookbook
There is a chapter talk about how to make FPS style camera, maybe it is helpful.