Online user-generated video sharing communities, such as YouTube, are becoming more popular than conventional studio-produced content. These communities provide every user with the opportunity to create and promote their own video content-a compelling venue for children and teenagers to share their stories and voices. In this study, we investigate the practices of youth video creators on YouTube. To do so, we conducted a content analysis of the audience engagement practices of 100 youth author channels, comparing them to adult and professional YouTubers when appropriate. We found that most youth authors are aware of and actively engage with their imaginary or real audiences on YouTube. They emulate the conversational and audience engagement practices seen in professional quality YouTube channels, but may not have the video editing or other meta-content skills or experience to do so. Based on our findings, we point to a number of implications for future research and design in this space.