I've noticed this noise on and off since I bought the car a couple months ago, but today I could hear it sitting in traffic so I decided to shoot a video of it today after it seemed to become more noticeable.
It's an odd humming noise that sometimes will cycle on and off every ~8 seconds at idle, other times it's continuous. After about 38 seconds in the video it starts fluctuating. Any ideas? It definitely doesn't sound normal.
Thanks in advance!