MOOCs (Massive Open Online Courses) have been a new form of online courses and becoming a mainstream delivery channel in higher education. In order to provide concretely academic references to developers for better video quality, this study aimed to explore the effects of the advance organizer design for MOOC videos on learners' achievement and flow experiences. The experimental videos were adapted from a Taiwan MOOC Digital Content Production, and videos were reproduced according to the research needs. This was a one-way experimental design in which the factor was the advance organizer design of the video with three groups: 1) no advance organizer for the video, 2) a main-idea web as the advance organizer for the video, 3) a sequence chart as the advance organizer for the video. A sample of sixty-eight university students voluntarily participated in the study. Participants were randomly assigned into one of the groups for video watching and survey completion. The findings showed that significant differences existed among groups. It was found that the video designed with a sequence chart significantly benefitted on learner achievement improvement and flow experience. This study helps to promote MOOC video production and improve the video-based learning environment.