Ok so I actually noticed that my serp belt needs replacing anyway, so while I have the belt removed, you are saying to start the engine and see if the noise is gone? If it does go away in that instance, then I know it's something in the accessory system. I do not think it's the starter because it on...

To add, I noticed today when I turn A/C on, the noise almost goes away. Still there but much quieter and almost non existant.

Video 1: https://youtu.be/DfYDpVjTPkU Video 2: https://youtu.be/MP8zQLFJqrw Can anyone help me with what this noise could be? Leaning towards vacuum leak. Only goes away when in gear with engine under load. It does not go away when the dipstick is pulled or oil cap is removed so I am ruling out PCV.