Help,dont know whats happening

[Partdestroyed]

Hello everyone i need some help.im pretty new to pc building and am about to finish my first build and am waiting for my hardrive to come in.
Anyhow i decided to test/turn on my pc to see of it all worked so far and its making a beeping noise dont know if its becaue my hard drive isnt in there yet but its kinda scaring me.[video="https://m.youtube.com/watch?v=vwaglLbLGm4"][/video]

Pc specs:
Core i5 6600k
Coolermaster hyper 212 evo
Gigabyte z170x gaming 3
Zotac gtx 1060
Evga 650 g3
Corsair vengeance lpx 16gb
(Hard drive is almost here)

 

[N3rdR4ge]

its the fan on the bottom. its either blocked by the power supply cables, something else or its dead.

 

[Partdestroyed]

Thanks it was a fan.