Have you ever blown out your fan exhausts with a can of compressed gas? That might be all you need at this point.

In your video, your recorder is very close to the keyboard. You need to move it back where your head would normally be after the closeup. You also do not speak in a normal voice to give a volume reference, so it is difficult to judge the severity of your fan noise issue.

it sounds like a bad bearing.... the fans shouldn't make any noise like that, only thing you should hear is the air flow...... that how mine are still, and I am at 9 months..... I haven't cleaned my vents, only a 2-3 degree increase (would vary with dust environment of course) in temp. For it to be dust, it would increase over a gradual period. RMA it ( if compressed air doesn't fix) , PM mason@ASUS if u have any issues with RMA. Good luck with it.