In order to introduce the video as evidence, they have to put somebody on the stand who will explain how the camera works and so on. And right there is your opportunity to confront them. You can ask all sorts of questions, like when was the last time they cleaned the lenses.
I'm going to need a source on that. I'm pretty sure a video can be entered as evidence without any actual witness to present it. Maybe you live in a state with unusual rules.
