My computer makes a loud buzzing sound

Skyleft

Commendable
Feb 13, 2017
16
0
1,510
Hello. I'd like to begin saying that I don't understand much about hardware, so I'm very lost and would need some help, as since a few weeks ago, my computer has been making a very loud noise and I can't determine where it's coming from.
It's a 2 years old computer, and it hadn't happened before. The right cover of the tower isn't permanently attached, since the USB ports are only accessible by uncovering it, so I'm not sure if that's the cause of the issue in terms of dust making it inside more easily.

Regardless, it's a very inconsistent sound. When it starts happening, if I tilt the tower, it'll fade away for a couple minutes, and then begin again, so I'm constantly moving it so that it stops, but it never does completely.

In case it helps pinpointing the origin and understanding the type of noise, I leave a video here showing how it all looks and how it stops when I tilt it:

https://photos.app.goo.gl/iZnW9fu281GvTQS86 (the sound is a lot louder than it appears in the video)

I'd appreciate any input.