He made a whole video sorting characters with unknown houses into houses and provided good reasons for them.

It's pretty obvious. I can't see her in any other house besides Slytherin.

She’s so manipulative, it would be hard for her to be in any other house. You could make a case for Ravenclaw tho

Who choose Hufflepuff?

Jk Has confirmed that she was in RavenClaw.

[Citation needed]

^^ W H E R E ?

I read it in an official harry potter fact book.

If it was official, then Skeeter's page would likely list her being in Ravenclaw

Hmm... idk then