Charles Goodwin (1943–2018) and Marjorie Harness Goodwin (1944–) have played a pioneering role within the emergence of conversation analysis as early as the 1970s, and then more globally within video analysis and the interactional study of multimodality, by engaging in the use of video materials for the study of verbal and embodied conducts in social interaction within a diversity of sociocultural contexts. This entry reviews their main contributions; it situates conceptually and methodologically their original approach to video data since the beginning of the 1970s. It shows how their work extends and revisits the Goffmanian notion of participation within a careful sequential analysis, and with a particular focus on aphasia, as well as on children’s disputes.