I asked him to watch the video, he said he did then repeated to me that “she was counting votes once.”

It's (current year), go ahead and politely say "really, I didn't see her grab new ballots. Here's the video, can you show me what I missed?". Whip out your phone and bring up the video.

I've found confrontation causes people to dig in their heels, offering them a chance to prove they're right will draw them in. You won't get everyone when they discover the truth, but even those that still refuse to believe their lying eyes will have a new seed of doubt. And some of those seeds will grow too.