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Whiteboard videos are a popular video format, allowing viewers to see drawings of concepts alongside explanatory text and speech. We hypothesized that whiteboard videos could support the education and recruitment of unrelated stem cell donors in Canada. A series of 5 sharable whiteboard videos about stem cell donation was produced and posted online in September 2018, including 1 full-length video (https://youtu.be/V4fVBtxnWfM) and 4 shorter videos titled “What Is Stem Cell Transplantation?” “How Does the Matching Process Work?” “How Are Stem Cells Donated?” and “How Can I Register as a Stem Cell Donor?” In the videos, metaphorical interpretations of stem cells as factories and genetic markers as barcode labels are employed to communicate complex concepts. The particular need for young, male, and ethnically diverse donors is reflected in the characters portrayed. Surveys demonstrated the …