This research looks at the representation of the political sphere in the media as it appears on the Internet, through the lens of a favoured object – the video. At the junction of technical, semiotic and discursive questions, as well as historically traceable social practices, this thesis adopts the complex and interdisciplinary point of view of Communication and Information Sciences to grasp the contemporary transformations of audio-Visual political communication. Our study of political videos during Nicolas Sarkozy’s five-Year mandate takes into consideration the longer history of the media and is organized in three analytical points. First of all, we show that political videos favour the appearance of new forms of visibility and publicity, which redefine the contemporary forms of recognition of the political sphere in the media. We then look at the fashion in which political videos have an impact in and on the field of political communication. Finally, we demonstrate that the readability and rhetoricity of political videos is dependent on audiovicy (audio-Visual literacy). Aside from the reign of instantaneity, the three sections of our argument intend to shed light upon the role of audio-Visual culture in the field of political communication, without losing sight of the significant materiality of the videos or the wanderings of their mundane existence.