This poster presents findings on a pedagogical approach we designed to enhance undergraduate computing students' understanding of functional programming (FP) through student-created video-tutorials. Students created two video tutorials. The first video-tutorial assignment asked the students to develop explanations of FP concepts (theoretical understanding of FP). The second video-tutorial required students to explain their solutions to programming exercises using Haskell (application of FP). Our findings suggest that the use of student-created video-tutorial can be effective for increasing students' understanding and application of functional programming.