She would need to already be in the theatre before you even approach the interview area. And there's no way to guarantee that you'd be interviewed before it actually happens. If she waits to confirm you're going to be interviewed there's no time to get into the theatre, in a spot where others coming and going won't block her view, in order to record your interview.
Yes, it's possible to record the snippets on the closed circuit screen in the theatre, but I wouldn't count on it being easy to get a specific interview.