Fig. 4

English videos content evaluation by LAM related content score. Unsupervised hierarchical clustering was performed by LAM related content score items (rows, n = 31) and single videos (columns, n = 64). In order to find potential clustering of video categories and key fact categories, the video category is shown in the top row (academic institution, governmental organization, news/media, independent medical professional, independent non-medical user) and the key fact item category (definition, symptoms, organ involvement/complications, risk factors, evaluation, management, outcome) corresponding to the single LRCS items in the last column of the heatmap. They are grouped into seven key fact categories, which are marked by different colours. The rating for each item (not addressed, partially addressed, fully addressed) is shown by intensity of brown colour (see score)