The re-use of secondary qualitative data has been a little used method in qualitative research. In contrast to primary data, which are collected by the investigator conducting the research, secondary data is data collected by someone other than the user. Arguments about the importance of authentic data, and that data are constructed between researcher and participants, have been posted as the two main reasons why qualitative data cannot be re-used by other researchers. Hence, the idea of authentic first-hand data has been a very strong argument in the qualitative research tradition. Quite a few qualitative data sets can be successfully re-used and re-analysed by other researchers. The re-use of qualitative data can provide opportunities for researchers to study interesting episodes which were not in the focus of the original study. Since secondary analysis of qualitative data has been relatively unexploited as a research method (Corty 2000; Corty et al 2004:239; Heaton 2004:8-12), the literature describing how qualitative researchers can re-use qualitative data is rather limited (Corti & Thompson 2007:2889). In this paper I discuss constrains and promises in relation to re-using qualitative data. My focus is on re-using videodata generally and the re-use of the PISA+ video data specifically.