Huh. That goes a lot slower than I would have expected. I wonder at their procedure for getting all the dirty ones out before the freshly-cleaned ones start piling back in.
Not complaining, glad to see them taking hygiene seriously.
The UK video I posted has some details, 15,000 balls per hour doesn't seem that slow to me[1], and still, according to the video, they are putting the clean ones into "netsacks".
Most probably when they have the sacks full there are not that many "dirty" balls remaining in the pit and they can put a separator of some kind across it to start putting back the cleaned ones.
Found the site of the manufacturer of that machine:
Not complaining, glad to see them taking hygiene seriously.