Fix noisy washing machine spin cycle

I have a Whirlpool WWDC9440 Freestanding Washing Machine which I've had for 4 years. Recently (or gradually as I can't remember a step change) the spin cycle has become very noisy with the vibrations sounding like it's about to take off! I bought sound dampening feet pads for it but hearing it again I think something needs repairing...

Here is a video so you can hear it: https://photos.app.goo.gl/6k9NZ9Bvbt18uDFF9

Any ideas what the problem is? What parts do I need to fix it?

Thanks for your help!