Weird Squeaky noise from my NZXT fans (kraken elite)

https://reddit.com/link/1odebog/video/5j8k2pkj4pwf1/player

Hi,

I just received my new PC like 2 months ago and since 2 weeks it has been making this noise from time to time, I think it is coming from one of the fans but there is nothing visible. I tried to tighten the screws of each fans but it didn't solved anything. Any ideas?