In the orange tape (the one where Lauren is watching the show) the dad says how they have mint chocolate chip ice cream which I think they mentioned was Laurens's favourite. After Lauren disappears, Amanda says "Mmmmm I love mint chocolate chip!" meaning Amanda can literally hear what's going on outside of the show. Also, the mum said "it's like she can't even hear me" meaning maybe Lauren is in a trance. Just a theory.