Rename hunyaun to hunyuan_video

BUR #656 has been rejected.

rename hunyuan -> hunyuan_video

Rename hunyuan to hunyuan_video to differentiate from potential Hunyuan Image 2 uploads

@ellipse9515 Please write a wiki for hunyuan first. I'd vote no if they are the same family of models. And the former tag only has 7 posts.

This bulk update request is pending automatic rejection in 5 days.

As fish explained. You can search for hunyuan video anyway.

This bulk update request has been rejected because it was not approved within 45 days.

The bulk update request #656 (forum #3839) has been rejected by @DanbooruBot.