@Myssa_Rei
I found a Kyouko Sakura video reuploaded from NND. the video contain pixiv artist link which lead to this artist pixiv page.. where they delete all of their stuff.
the thing is, I read this particular page on pixiv just few weeks ago. Scary how they can be deleted so fast..
then I realize I was copying the wrong url. this one is fine
This is the disappearing artist https://www.pixiv.net/en/users/20470051