This paper describes how future physics teachers' involvement in annual Family Math and Science Day--a public outreach event at the University of British Columbia, Canada--has a potential to transform them as physics demonstration experts and amateur video producers. These science demonstration videos serve as teaching and learning resources not only for their own coursework, practicum, and post-graduation, but also as a useful resource for their peers and other educators. The production of demonstration videos was framed around studies that support physics and general science teacher-candidates' engagement in hands-on science, science communication, and deliberate use of technology to promote active learning.