This study investigates meaningful events that student teachers identified from video recordings of their teaching practice that were used to improve their knowledge base. Data were collected from 21 student teachers at an Estonian university using a guided reflection procedure. Deductive qualitative content analysis was performed on meaningful events and student teacher reflections. Pearson's chi-square test was used to compare the differences in types of practical knowledge that student teachers communicated when reflecting on meaningful events. Results indicate that video recordings facilitated the selection of meaningful events related to various aspects of teaching. Moreover, reflecting on empowering events advanced theoretical reasoning, while reflecting on challenging events advanced artefacts: i.e. knowledge that could guide student teacher actions in various teaching situations. Therefore, this study offers valuable insight into the kinds of knowledge student teachers construct in their teaching practice.