This study describes how 3- to 8-year-olds' justifications for their reality status judgements about people on YouTube relates to their age and previous YouTube watching experience. Using a within-subjects design, children were asked about their beliefs regarding the reality status of a purported YouTube video and provided justifications for their responses. Caregivers provided information about children's home media use and children were asked about their favorite YouTube videos. Results suggest that increased age--and not amount of experience with YouTube--relates to a more nuanced understanding of YouTube as evidenced by a consideration of the medium in justifying reality status judgments.