Hi everyone, I'm doing a study of motivations of users in viewing YouTube videos and I'll be constructing a questionnaire that measures users' preferences of the different types of videos on YouTube (among other things). I'm wondering if anyone has any suggestion on how to classify the videos on YouTube (or better yet any published papers that adopt a classification system of YouTube videos). Obviously one straightforward way is to adopt the exact same classification that already exists on YouTube (Autos & Vehicles, Comedy, Education, Entertainment, Film & Animation, Gaming, Howto & Style, Music, News & Politics, People & Blogs, Pets & Animals, Science & Technology, Sports, Travel & Events) but I feel they do not provide sufficient differentiation especially in the area of user-generated videos. Best regards, Dominic