This is a two-part discussion. Part 1 is entitled "English Language Learning in Subject Lessons", and Part 2 is titled "Video as a Research Tool/Counterpoint". Working with different research concerns, the authors attempt to draw attention to a set of methodological and theoretical issues that have emerged in the research process using video data. The broad aim is to signal the need to address these complex and intriguing issues explicitly, as video material is used in a great deal of educational and social science research. (Contains 1 footnote.)