Instructional videos have been developed to engage pre-service teachers to learn how to teach scientific approach in science classroom. This study aimed to improve preservice teachers' awareness of scientific approach in science classroom through instructional video along with their responses. Thirty two pre-service science teachers from Universitas Negeri Surabaya, Surabaya, Indonesia, participated in this study and observed two different instructional videos using video-analysis worksheet supplemented by the supervisor. In response to the instructional video, results showed that pre-service teachers noticed well about application of scientific approach in inquiry-based teaching and cooperative learning models. Pre-service teachers also showed positive views about the instructional videos and became a reflection for their own future teaching actions and practices. Supplementation of the video-analysis worksheet during the implementation and peer-discussion among preservice teachers can be used to improve pre-service teachers' awareness as well as to provide clear exemplary about how to integrate scientific approach at each phase of inquiry-based teaching and cooperative learning models. This study implies that the present instructional videos and followed-up video-analysis task are adequate to facilitate pre-service teachers to understand what to do in actual classroom in terms of applying scientific approach as envisioned by Indonesia curriculum reform.