“…Studies have examined the characteristics of user-generated video files [6,7,11,16,21], use of social networking features in video-sharing services [13,16], the structure of YouTube's "friend" network [15], the use of the "video response" feature of YouTube [4], the popularity characteristics of user-generated videos [5,6,10,11,16,21], and also models for user-generated video popularity prediction [14,19]. Here, we restrict attention mostly to related work on popularity characterization and modelling for user-generated videos.…”