Hacking Democracy Full Documentary (2006)
https://youtu.be/6YldIdkjrqMIt is fairly long at 1.26 hrs and from 2006 but documents the election fraud that has only grown worse and shows what everyone is trying to drown out the cries of fraud. I doubt today this video would be made and if made would not be distributed.
Very informative and known how to alter an election. It even talks in the very beginning about the USB drives to alter the machine.
This video is about as mainstream as it gets.