Here are my thoughts for spending three days in Corfu. That video is great, by the way!
Day 1: Head to the Achilleion Palace after breakfast. It's a palace built by Empress Elisabeth of Austria. Here, you can admire the beautiful gardens and enjoy the scenic views of the sea. Next, visit the Corfu Old Town, a UNESCO World Heritage site, and explore its narrow streets, ancient walls, and historic churches. End your day with a relaxing stroll along the Spianada, the largest square in Greece, and enjoy a refreshing drink in one of the many cafes and bars nearby.
Day 2: Start by taking a cable car to the top of Mount Pantokrator, the highest point in Corfu, and enjoy the breathtaking views from the summit. Next, head to the Palaiokastritsa Beach, where you can rent a boat and explore the beautiful coastline. End your day by watching a traditional Greek dance show and indulge in some delicious local cuisine.
Day 3: Start your day by relaxing at the Glyfada Beach, one of the best beaches in Corfu. Here, you can sunbathe, swim, and enjoy the beautiful turquoise waters. After that, head to the Sidari Village, where you can admire the famous Canal d'Amour and its stunning rock formations. Finish your day with a visit to the Corfu Beer Brewery, where you can learn about the brewing process, taste some delicious beer, and enjoy the beautiful sunset views from the brewery.
These are just some thoughts. There's so much you can do!