It is a Twitter embedded video so you may get a twitter message and have to click to view it.
The trailers are at RR Donnelly in Seymour Indiana. The material inside looks like scrap paper from printing of mailers, or maybe the result of some of the mailers being damaged. They aren't ballots, and the trucks are not delivering mail. The trucks are probably used to move the printed direct mail pieces from RR Donnelly to the post office.
RR Donnelly is probably the company printing out the Trump campaign mailers. That is the kind of thing they do.
I think this is a false alarm.
The ballots had been torn into pieces. The guy held up one of the undamaged Trump mail in ballot applications to the camera.
They aren't ballots,
They are/were mail in ballot application forms being mailed from the Trump campaign to Trump voters. Read the OP and I quote from the OP:
Huge trove of Pennsylvania mail-in ballot applications sent by the Trump campaign to individual voters, found destroyed in USPS trailers…
and the trucks are not delivering mail
Who said they were? Can you read the OP? It says they were found destroyed in in USPS trailers. That is the point of it all, to destroy and dump them in a USPS trailer to prevent them from getting delivered. Can you read?