Earlier quoted context omitted.
"animated video generation model presented by Bilibili." You understand that china has "different" view on copyright,license etc right??
Not that different. Bilibili is a big, above-board video streaming service; they definitely have distribution rights to a large collection of anime content. (They also have YouTube-style user uploads where proper licensing is less likely.) It's the equivalent of Crunchyroll putting out a video generation model. If the rightsholders disagree with this usage, it'll come up during the negotiations for new releases.
how can you prove then??? its literally the same way OpenAI use Ghibli material and they can't do anything about it