A video medium would be most effective for teaching a friend how to sew. Sewing is a visual and hands-on activity that involves following specific steps and techniques, which can be more easily demonstrated and understood through moving images. A video can show the precise movements, how to handle the fabric and tools, and the overall process from multiple angles. It also allows the friend to pause, rewind, and re-watch as needed to fully grasp the sewing techniques being taught.
