Using a Design-based research approach, a learning module has been developed in collaboration with subject matter experts for continuous education in sexology. Its main feature is a video of an interview, played by actors, that introduces learners to the specific structure and particularities of such an interview. Text captions appear during the film that focus the learner's attention to the main dimensions of the interview. They are linked to reflection pages with interactive exercises on these subjects. Based on adult learning and constructivist theories, a non linear structure allows for a very flexible navigation in the module. This pedagogical scenario allows individualized learning processes adapting to very different learner profiles. The module has been developed in three iterative cycles, each being thoroughly analyzed regarding usability and learning experience. Test users were quite representative of an aim public of highly educated professionals of the medical or paramedical field. Tests were conducted in real life settings. Results were integrated into the following step and the final version is a learning module that is close to a quality allowing online publication. Analysis of usability showed no major problems. The non linear structure was well accepted and satisfaction of the test users was good. This research also allowed identifying several design rules. Staying close to the real life situation of continuous education in sexology, this research allowed first observations of the usability, acceptance and learning effectiveness of an innovative learning module that combines interactive video with a non linear structure.