This hands-on workshop, organized by the LIBER Citizen Science Working Group and project partners from the CeOS_SE Project, was a collaborative learning activity about citizen science engagement. The workshop had two folds: 1) An interactive 2 hours workshop with 1 break to create an example of video promotional material (a 2-3 min. episode) for a library engaged in a citizen science project. 2) Knowledge and practice exchange from the CeOS_SE project in which LIBER is a partner.