In academic English courses, learners are often required to research and cite their sources appropriately. Teaching how to cite sources can be challenging for teachers. This blended research and practice-based study explores how H5P, a plug-in, supports learning APA style website citations. While previous studies reported that H5P can enhance learners' engagement and motivation, evidence on learning outcomes and instructional design is limited. Addressing this gap, the present study aims to explore how H5P supports learners' engagement and understanding of citation rules. A mixed-method approach was adopted to collect data from quiz performances and learners' feedback surveys. Seventy university students participated in a flipped learning activity by watching an H5P interactive video. The findings suggest that H5P can support learners’ engagement and understanding of website citation rules, but pedagogical impact requires careful design choices. This presentation will introduce H5P interactive videos as a tool for teaching APA citations in the L2 classroom. Participants will learn how the instructional design facilitated or hindered learning, as well as the challenges encountered during implementation. This presentation will contribute to CALL by providing insights into H5P, an underexplored tool with some implications for future research.