This study aims to measure the effectiveness of project-based learning through the creation of stop motion videos as a medium for environmental awareness campaigns among prospective primary school teachers, within the framework of innovative STEAM learning. The model used is project-based learning integrated with the STEAM approach. Tools included smartphones with the Stop Motion Studio app, storyboard templates, and video editing software. The research design is a case study using a weak one-shot experimental method, involving pre-tests, post-tests, and questionnaires administered to 80 prospective teachers. Research instruments included observation sheets, Likert-scale questionnaires, and expert validation forms. The results showed that STEAM-based project learning significantly enhanced students' creativity, collaboration, and understanding of environmental concepts. The production of stop motion videos also contributed to the improvement of digital literacy and communication skills. This approach effectively increased student engagement and awareness of the importance of environmental education. Quantitative data indicated a significant improvement in learning outcomes after the intervention. This study introduces stop motion video production as an innovative tool in STEAM project-based learning, making a meaningful contribution to the development of 21st-century skills and environmental awareness in teacher education programs.