The results show that personal networks are the most important source of video recommendations, while boys are more strongly influenced than girls by the number of times a video has been viewed and the video platform’s suggestions. This shows the importance of digital, and especially media, literacy in ensuring that teenagers have the information necessary to select videos from trusted sources and with fact-based content. Additionally, the study uses 2018 PISA data to analyse the extent to which students’ online behaviour at home is discussed in school lessons and how well they are taught to deal confidently with digital media. This two-pronged analysis compares the demand and supply sides of digital teaching. The resulting policy recommendations, such as teaching media skills to both students and teachers, are given additional urgency by recent experience with digital learning during the Corona crisis.