What do you think republicans will do when confronted with said information?
https://www.youtube.com/watch?v=D1284ARxFag
I agree that that looks bad and the election official probably should have allowed a hand recount of that ward and run some diagnostic on that counter, however...
That process looks very similar to the one my county (in Iowa) uses. In my county, what's shown in the video would have been the official canvass. On Election Day, ballots are counted by the scanner as they are cast. When the polls close, the numbers are downloaded from the scanners and sent to the county office for the unofficial canvass. After allowing enough time for absentee ballots postmarked on Election Day to come in, they start the official canvass.
At the official canvass, you've got the county workers and volunteer observers on behalf of various parties/candidates. To maintain chain of custody, only the county workers are allowed to handle the ballots, the observers can only... well... observe. If the unofficial canvass and the official canvass match, but observer's click count doesn't match, I would hope they would hand count.
That said, I would tend to distrust the click count because it's error prone. Optical scan machines typically have an error rate under 0.5%. At the very least I would want to know how the undervote clicker counted undervotes, only pure undervotes, undervotes plus secondary candidates, any ballot not for a single major party candidate (overvotes.) Also, the county workers are feeding the ballots through the counter quickly. They have thousands of ballots to run, they're not going to slow down for an observer to double check a ballot for their click count.
In that video, there's also a question of what's happened before. I assume that's the county clerk saying they wouldn't hand count even if it was only five votes. She also says that the Jill Stein-affiliated observer has "disrupted" the proceedings multiple times before. "We're not going to hand count even if it's five votes" is understandable if every other time they've done the hand count against the two machine counts vs the click counts, the machine counts were found to be accurate.
Now, I'm not naive enough to think that there aren't any corrupt local election officials, but in my experience, they are by and large professional and non-partisan during tabulation. Having a partisan volunteer step in off the street and bitch about their procedures (half of which are in place because years ago some other partisan volunteer bitched about something else) has to be frustrating.
I want to know more about the refusal to do the hand count and the tossing of the 20 ballots, but if there are valid explanations for those - and there very easily could be - what's shown in the video isn't really any sort of bombshell.