[VIDEO PROOF] Whirring / buzzing / whining sound from my 2021 M1 iMac whenever exporting images/pdf from Adobe Illustrator or Photoshop

I've been noticing a weird sound coming from the iMac whenever performing certain operations in the last few months. Perhaps it's always performed like this but today I read this thread and started actually worrying, so I decided to actually record the computer whilst performing the last task with which I noticed the sound (exporting three Illustrator artboards with 500ppi images as a single .pdf using "Save As...").

The video pretty much covers the rest.

https://www.youtube.com/watch?v=_SvXczjL1Ao

I'm hoping this is an overreaction on my part honestly. Yes I've called support, it seemed to be dismissed as fan noise but the assistant forwarded the issue nontheless.

Has anyone else had this problem? Is there a reason for concern based of the thread linked above?