In this video, the narrator demonstrates how to make visual adjustments to an audio guest book event using Canva. They explain that Canva is a user-friendly tool with built-in assets but mention that Photoshop, Illustrator, or After Effects can also be used. The key sections customized are the start screen, video countdown, and default background. They provide detailed steps on changing colors, adding logos, and incorporating audio clips. Additionally, they outline the process of exporting the elements, renaming files in Dropbox for synchronization, and using advanced settings in the event editor to regenerate manifests. Finally, the video shows how to add simple animations to the start screen to enhance visual appeal.