nnn21

Hello all, 2 weeks ago I started to get weird whining noise in the front left, we can even hear it in the cabin.. but it magically went away after a day. Now it's back - it goes on even after engine is turned off. If car is standing for half of an hour, everything seems to be back to normal for couple of days when noise comes back again.

Attached is a video of the noise - anyone have an idea what it could potentially be? Second air pump?

Thank you!