iPad to video student responses

Nothing fancy....I have a student in my class who is non- verbal autistic. We are in the process of making some changes to her IEP and her amazing EA was asked to use 15 different kinds of candy to establish the candy that will be her most potent reinforcer.  The EA used an IPad and video taped this process.  This was great because the Ea was able to share the video with our resource teacher later in the day.  Later the spec. Ed consultant was wondering if the student preferred a certain colour.  The video can re-watched to see if there was a preference to colour.    So simple....and very valuable