Most research of the use of recorded lectures by students is based on surveys. In this article we will report on the further analysis of student’s use of recorded based on methodological triangulation. We will describe the process of data pre-processing where a number of data sources are combined after which the data is cleaned, removing outliers and data not relevant to the research. The analysis looks both at the data form a high level point of view and on the more detailed level for a single course. We will show differences and similarities in the responses by the students about their use of the recorded lectures and the data logged by the systems that serve the recorded lectures to the students