What are the best upgrades for my 5-year-old PC on a budget?

I'm looking for some advice on how to upgrade my PC that's about five years old. Here are my current specs: I have a Ryzen 5 3600 CPU, a GTX 1080 GPU, a Crucial P1 NVMe M.2 500GB SSD, 32GB of Corsair Vengeance LPX RAM, and a Gigabyte B450M motherboard. My budget is between $300-$350, but I'm open to cheaper options. I'm especially interested in making my setup better for video editing. I'm not looking to build a whole new PC right now because I have other expenses, so I'm considering smaller upgrades like a better CPU or GPU, and I might transfer some components to a new build when I can afford it.