So my dear friend,
Driving around since 2 days now without the radio
As your video is pretty poor quality
or my ears are going bad, i decided to listen very closely so i could identify a buzzing sound with my own car.
Tried with cold and warm engine. Every RPM aswell as every gear. From very cautios to WOT... Didn't hear anything "buzzing"
I do hear my drivetrain pretty good. Don't know of it's the transfer case that makes a lot of noise...