Yep, that's the grommet I meant. However, most of the time they don't need to be replaced. One thing the vid doesn't show is how they often pop loose from the white plastic frame you see underneath the hole. They need to seat into that properly or the grommet rides up the shaft and makes noise. Popping the plastic cover loose and hitting the grommet with WD40 (after making sure the grommet is seated) will shut almost all of them up. Some white lube in the area where it contacts the shaft is effective for stubborn cases, stick your fingers down between the grommet and shaft and smear it around. The noise is a garden variety rubber-squeak, so with the grommet seated properly, almost any lubrication will fix it without new parts. The only time I replace them is if the rubber is clearly cracked or deteriorated, and that's rare.