Recently, more extensively, but since the end of the 90s, a phenomenon has changed the roles of those who produce and consume information in the world. This dissertation attempts to analyze this phenomenon, called here mass self communication, which took place in the internet in recent years. Specifically, the focus of this study is the website YouTube, whose slogan is broadcast yourself, and has over 78 million uploaded videos - about 240 thousand movies are being added there every day. Of the web 2.0 phase, in which ordinary people publish text, photos, videos, comments, drawings and other types of content on the internet, YouTube, originally conceived by three friends willing to share with their group their personal videos, today integrate Google Inc., one of the largest worldwide technology corporation groups. In addition to the large amount of cloned content, copied and digitalized from blockbuster movies, clips, TV soap opera and other sources, most of the videos published and displayed in YouTube are brand new. For the analysis of these videos produced by common users, they were grouped in three categories: viral films, family movies and video biographies. Some selected issues, particularly of identity, authorship and agency are then discussed, raising speculations about the nature and prospects of a interconnected society.