You can avoid static friction by using viscious bearings. Either have it sliding on a film of oil or use hard wheels with fluid bearings.

Tho even(especially) viscious friction provides different a force depending on speed, so it introduces a new problem.

How about measure the friction with some sort of force-guage, and also measure the force provided by the moving mass. Then make sure the latter is always much greater than the former.

You could nearly eliminate even moving-friction by operating it on one of those 'air tracks' they use in high-school physics labs.

Pity these Youtube guys don't bother witch such important features.