One of yall with IT certs tell me why my computer is vibrating like this

[Kings County]

Basically the first 2 minutes after i turn it on it sounds like a loud fan and the whole computer starts vibrating
idk if the video picked up the sound well enough
but what do u guys think it is ? does something need to be tightened?
if you dont know @ someone u know is good with hardware

 

[Mowgli]

Smash it against the floor out of anger.

Remove components and turn back on until problem is identified

Remove hard drive
Remove ram
Remove fan on cpu
Remove CD from CD Rom and remove cdrom

Look for rogue screws.

Reseat power supply.

Don't be lazy.

 

[Jax]

I wish I knew so I could help you fam.

 

[O.T.I.S.]

Its probably the HDD... See if you can slide it out the tray without unplugging it (or just unplug it from the power supply and boot it up, I dont think it matters) and try turning it back on and see if it vibrates