This.
I especially can't see him doing it, he seems quite private so I can't see him going for something like this.
Also as others have said the OP has posted a thread title that actually has nothing to do with the tweet. Them hanging out does by no means suggest he'll be in the style video!?
Taylor is a smart business woman. We all know she befriended Lorde so she can collab with her soon.
As much as i want this to happen, i dont think it will. Cant picture Harry agreeing to do this. Neither can i picture how this music video will be, like at all