Exactly. How hard could it be to show that the "counting" of the ballots was manipulated electronically?
Note that this is exactly the history of Georgia elections. We used to have that Diebold system which never made a paper ballot and the votes were ever known and counted electronically. With that system, it was hopeless to ever "prove" the intent of the voter and setup errors of the machines or even fraud could not be shown in post election "recounts".
That system was court ordered to be replaced by a system which relied on paper ballots that could be preserved and recounted to verify the intent of the voter and the election outcome. Georgia selected the Dominion system as the replacement system. Regardless of how you view the Dominion system, it did produce paper ballots that could be manually counted outside of the system in recounts if desired.
That is what was done too. All of the paper ballots were human counted to see if there was mischief in the electronic counting of those ballots. Like you said, it would have ben child's play to show the mischief by recounting the ballots by human. No mischief was uncovered. What does that tell us about what was presented in the 22 minute video? Basically that there is no there there.
On the video they claim there were subtractions in some counties or vote count swaps in one case. I agree that should have been easy to spot in the recount and it was not. One of the problems with almost all videos is while they waste 10's of minutes on fluff and innuendo they rarely address the facts on the ground like the recount. If there's an explanation why the recount numbers were identical in many counties, I'd like to hear it. No bonafide recount should produce identical numbers.