PC making very loud sounds and I dont know why

Hi,

Ive been having recent issues with my PC.

Every so often it makes incredibly loud sounds, which im guessing comes from the AIO CPU cooler.

Its excessively loud and sounds nothing like what a PC should be under full load.

It eventually stops making so much noise after a while, Not sure how?

It looks like the middle fan might be the issue as its spinning not so smoothly as the others?

Its a relatively new PC from April, The Cooler is a DeepCool LS720.

Im wondering if there is anything I can do to fix this?
Or if its just better to bite the bullet and try claim my warranty with the product.

Here is a google drive link to a video I took with the sound

And here is my userbenchmark score

Thank you!