Are you asking here how AI art works, in general? That would take more than fits in a comment, and there are lots of explainers online. You could even ask ChatGPT this question. But no, it's not piecing bits of videos together. It doesn't store enough of each individual piece of art to have a piece. The art might take up X bytes, X being a large chunk of the whole internet, but the AI is only a fraction of a percent of that. So it can't possibly store chunks of each piece of art. Even 1 pixel from each piece of art would be too much. But it does store the patterns the art had in common with each other. And from that, it generates.