**There is no credible evidence to support this.**

The only evidence here is a few guys talking on a video. We can't verify anything they say, not even that they were actually at a wedding in Oklahoma, never mind anything they claim about ballots.

The most obvious deficiency is that anyone who seriously believes they have found evidence of voter fraud should be reporting it to the relevant authorities so it can be investigated, and a thorough examination made of the ballots and other evidence. They have not done that. Their behaviour has been entirely consistent with that of someone wanting to get a bit of attention by making sensational allegations.

Other flaws in the story:

 - The reports disagree about when the wedding took place. The first link says voting had "taken place earlier in the day". The second says "earlier in the week". It is hugely unlikely that a wedding is booked into a polling station venue on election day, given polls don't close until 7pm.
 - Assuming the most likely timing is correct, several days elapsed between voting and the alleged wedding, during which time we are asked to believe that nobody emptied the trash cans - especially the alleged people who allegedly dumped the alleged ballots and would allegedly be keen to remove the evidence of their crime.
 - Physical ballot boxes are not generally openable at the polling station. Instead they are not opened until they are taken to the counting office. Someone would have had to break open the boxes to get at the completed ballot papers, which would have been noticed (and been a major incident) at the counting office.
 - Other cases have shown that many papers look somewhat like ballots used for voting, including sample ballots, unused ballots, and papers printed on a home computer made to look like ballots