A friend just sent this video she recorded election night.
Start of video PA total votes are:
Trump 1,690,589
Biden 1,252,537
At the end of the video the totals on the screen are for PA are:
Trump 1,670,631. -19,958 votes
Biden 1,272,495. +19,958
What a coincidence!
43-sec vid see the votes swap from Trump to Biden:
https://twitter.com/A_Blossom4USA/status/1325500457331138567