In this course, we investigate how to manage growing organizations, focusing on the process of community building, both internally in the organization and externally among customers and other stakeholders, ecosystem development and user-involvement as growth strategies. During the course we also advance the necessary skills related to co-creation and to identifying possibilities for generating value for groups of people. We learn to translate knowledge of these processes into practice by applying them to the development of a YouTube channel. Working with YouTube offers a unique opportunity for students to gain new practical experience with innovation processes involving quick, iterative prototyping and co-creation. YouTube also offers an opportunity to increase one’s practical experience with community building and user involvement. Creators of YouTube channels, such as, Crashcourse and Epic Rap Battles of History have achieved both fame and economical success by building communities around their products. The course will unfold over six weeks, with 4-hour sessions meeting once a week. Participants will work in teams and engage in processes of user involvement and ecosystem expansion. Using different approaches to community building, they will develop their brand and product over time, refining their business model in relation to their growing community.