ARTICLE Phan_MUM_2022/IDIAP Health Talk: Understanding Practices of Popular Professional YouTubers Phan, Thanh-Trung Michoud, Chloé Volpato, Lucia del Río Carral, María Gatica-Perez, Daniel EXTERNAL http://publications.idiap.ch/attachments/papers/2022/Phan_MUM_2022.pdf PUBLIC Int. Conf. on Mobile and Ubiquitous Multimedia 2022