First of all, don't worry about your interview. They typically aren't deciding factors and we never expect people to give great answers!I wouldn't read too much into this. They're probably very busy with teaching and interviewing.
And Chris is right. If you don't get a response, don't read into it. Remember, we're not only incredibly busy with teaching and admissions (which both take up a ton of time), we're also working film professionals with careers of our own! Furthermore, all correspondences we have with applicants need to be highly limited and controlled for ethical reasons.