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.

"It's the equivalent of Crunchyroll putting out a video generation model. If the rightsholders disagree with this usage"

how can you prove then??? its literally the same way OpenAI use Ghibli material and they can't do anything about it

OpenAI doesn't have an existing business based on licensing Studio Ghibli content, so the only option Studio Ghibli has to stop them is to sue them and hope that OpenAI is found to have infringed their copyright.

Bilibili does have an existing business based on licensing Studio Ghibli content, so Studio Ghibli can threaten to refuse to sell them distribution rights for future releases, even without a lawsuit.

Do you think all that all the big guys just asked people while training their models?

Really? We've all seen the stories on how Meta sourced book content from Anna's Archive and still you try to claim things are different in China?