Humming noise at motorway speeds

[Jth0m]

Hi everyone, I’ve searched every forum I can and I can’t quite find the right fix

when I’m driving above 2000rpm and anywhere from 50mph-80mph I get a weird hum from the front of the car. The confusing part is it only exists when I press the accelerator. When I push fully down the noise is less, when I let go the noise disappears. But when I maintain speed it’s very much droning away. 

I’ve had my tyres, wheel bearings and induction pipes all checked and they’re all fine. 
I have included a video where you can hear when I’m pushing the accelerator and when I’m releasing it.

any help is more than appreciated