Oscillating feel in clutch pedal?

[orangesquare]

Anyone ever experience, or know what it means to have a clutch pedal feel like it's oscillating or jiggling at the top of its motion (just as its being depressed), usually after slowing down after extended driving above 3K rpms?

Goes away after the first shift/downshift. I've never felt this before in other cars, and admitedly, am semi new to p-cars so thought i'd put it out there.

[Sonic dB]

Little shaking feeling...? I have a bit of this too and am going to change out the tranny and motor mounts soon to see if it helps. Perhaps some of the mechanics here can elaborate more or give better suggestions.