“…The most common approaches are case studies investigating, for example, participatory aspects of YouTube (Erviti and León, 2016;Dubovi and Tabak, 2020), the role of YouTube videos for internal science communication (Kousha et al, 2012), the coverage of controversial issues like climate change or vaccines (Shapiro and Park, 2015;Allgaier, 2016Allgaier, , 2019Donzelli et al, 2018;Erviti et al, 2020), the role of user comments for the scientific discourse of lay-persons (Heydari et al, 2019;Christ, 2020;Dubovi and Tabak, 2020), the motivations for watching science videos on YouTube (Rosenthal, 2018) or the differences between user-generated content and professionally generated content (de Lara et al, 2017). Besides these case studies, there are already some publications which put the single results in a nutshell by drawing some general conclusions for example on the benefits and drawback of this new media landscape (Rosenthal, 2020), on the danger of an erosion of the epistemic order of society (Neuberger and Jarren, 2017) or they discuss the impact of online videos on the transformation of science communication and the image of science and scientists (Bourk and León, 2020, p. 117-123). Particularly the publication of the international research project "Videonline" (León and Bourk, 2020) summarizes research results from different countries, giving an overview of investigations on several relevant aspects of online science videos including a classification of online science videos (Davis and León, 2020; García-Avilés and de Lara, 2020) or a discussion of criteria for the epistemic qualities of online videos (Francés and Peris, 2020).…”