Shake Shake Shake

Oh yeah it goes away with any additional rpm. It's just an idle thing. I bet it's a combination of the clutch and the soft motor mounts. Like I said, regardless of how weird the car sounds in the video, it's got a smooth sound and a healthy idle aside from the shake.

Let me rephrase, in neutral with the engine shaking give it a quick rev and let it return to idle. then see if the shake has lessened. Do the same with the clutch in. This should reset the weights, and smooth out the idle caused by the weights. The effect is only temporary, but it should give you an idea of how much shake the weights on the pressure plate are causing.