Are you familiar with Edward Solomon? They mentioned him and I saw his videos probably at the end of the last year. From my interpretation they were pulling votes from a set of different precincts constantly in order to get the number that they wanted. This important because they also refused to report precinct data for the first time in decades to my knowledge. My guess is they did this because the precincts are smallest part of the data set so by refusing to report them they were able to steal and add as many fake votes that they needed. You can think of this as not having 10,000 votes in a precinct that only had 5,000 individuals which is obviously not possible even though we have seen counties with more votes than possible thanks to mail in voting, Richard Baris briefly spoke about the importance of precincts so this is also my own interpretation

The fact that the algorithm likely had human interactions would indicate it was connected to the internet (we know that already).