Writing and storytelling activities require students to be able to identify, develop, and convey ideas in a structured and engaging manner. However, students may still experience difficulties in finding and developing ideas when learning activities use limited approaches. This activity introduced a coastal environment-based video as a stimulus for students’ writing and storytelling activities at SMP Negeri 004 Satu Atap Karimun. The activity was conducted on August 26, 2026, involving 40 students from Grades VII, VIII, and IX. The activities included a brief presentation on the coastal environment and plastic waste, a screening of the animated video “Jejak Plastik di Laut,” discussion and idea exploration, writing and storytelling activities, and the completion of a student response questionnaire. Data were collected through 20 questionnaire statements using a four-point Likert scale and five open-ended questions, and were analyzed descriptively through percentages and thematic grouping. The results showed predominantly positive student responses to the use of video as a learning stimulus, particularly in terms of visual appeal, relevance to the coastal environment, assistance in generating ideas, support for writing activities, and students’ perceived confidence in storytelling. This activity indicates that coastal environment-based video media can be introduced as a relevant and engaging stimulus for supporting students’ literacy activities.