Learn how to create eye-catching YouTube thumbnails using your iPhone or Android device in this comprehensive 15-minute tutorial. Discover the step-by-step process of using Canva, a free thumbnail maker app, to design professional-looking thumbnails quickly and easily. Explore various features including template selection, background customization, text addition, element insertion, image editing, and layer management. Master techniques to make your thumbnails stand out, such as using the background removal tool and adjusting opacity. Follow along to create, save, and upload your custom thumbnails to boost your YouTube video's click-through rate and visibility.