A video shared on social media shows an overhead shot of a table at a polling place (it's not clear where). There are two people at the table. A man is reading ballots, a woman is filling in ballots. This is presented as evidence of voter fraud.
It is actually the standard practice of duplicating or "transposing" damaged ballots so they can be read by the counting machine, as explained in this Michigan Board of Elections training video from 2016.
The process uses two election inspectors of different party affiliations to avoid fraud. Here's the full process from the Michigan election officials manual.