In the science of interviewing, there’s a name for these kinds of demonstrations. They’re called work samples. A work sample is a snapshot of an applicant’s skills. Sometimes you can provide one by submitting a portfolio of your past work. Many colleges have those built into their admissions processes, inviting students to submit their creative portfolios. You can send in recordings if you’re a musician, scripts if you’re a screenwriter or playwright, and videos if you’re an actor, dancer, or magician.