Here's a screenshot of the video right at 6:55. I added a couple text descriptions, about the only component I can think of might be the fan hub. It's got several fan cables connected to it. If so, it also comes with the case. It's supposed to be connected to the pwm fan header (cpu_fan) on the motherboard. Then additional fans plug into it and are speed controlled so your case fans spin faster and slower with the cpu fan. If the system is under load and running hotter all the fans (cpu cooler and case fans) run faster, as everything cools down all the fans can run slower and quieter.