That fan is just a random fan they've thrown in. I don't even know what I'd do with it.
By the way, what he says around 1:35 about just setting it to 4.0ghz is probablly the stupidest method of overclocking you can do. He only stress tested by encoding, but what he didn't notice is that more than likely he had alot of errors in that encoding. You absolutely must stress test to prove stability of an overclock or you risk damaging your brand new CPU.
The second video is alot better, but I honestly reccomend reading This
It's definitly worth the time to get to know it and understand it.
The basic principal to overclocking is always increase speed, stability test; If pass then increase speed again, if fail adjust voltages - ussually vcore.