The dissertation analyzes the iReporter project, which allows viewers to become involved in Czech Television broadcasting. The dissertation is divided into theoretical and practical parts. The theoretical part deals with participatory (citizen) journalism, both abroad and in the Czech Republic. I attempt to outline the history and present of public involvement in the production of news, with a focus on TV- related participatory journalism and Czech Television in particular. The dissertation describes the way in which viewers became increasingly involved in TV broadcasting over time, be it in movies, TV series, entertainment programs or news reporting. I also explain how television began to utilize new media, mobile journalism and social networks, all of which brought it much closer to its viewers. The theoretical study is followed by a practical part focused on the iReporter project. For example, it provides information about the people in charge of the project, the number of participating contributors, the process a video takes to get on the screen, the regions with the most active iReporters and the programs/shows which use their videos the most. This is followed by a mapping of the iReporters' weekly activities to show, for example, the proportion of the most active contributors, the most popular topics...