Laser started to make a whine sound about 50% of the time during the cut? should it worry me

If anyone knows what this is please let me know!, started to get a high pitched whine from cuts, seems to start 2-3 seconds in most times and is intermittent during the cut, i can see the amp meter rise slightly during the whine also, vid below shows the whine starting at the 6 second mark if anyone is familiar with the noise, I’m suspecting PSU on the way out!, cutting fine and engraving fine still

Its hard to tell from the video, but my machine will sometimes make a high pitch noise that is similar. I traced my noise back to my air nozzle.