This video shows them kicking everyone out of the counting area for the "leak" then staying behind and when everyone is gone, they pull ballots out from under a table and start processing them... unsupervised (illegal)
This gives explanation provided by lawyer with a better view:
and the best part... this time period where they did this corresponds with an anomaly they've been seeing where 23,487 votes went in at the same time and it was 98% Biden...