This looks really helpful for doing quick demos during screencasts. I like that it keeps the project local, too. Very neat.
Also, just as an FYI: even though the core of CodeSwing is local, you can also store your swings in GitHub repos or Gists, via an integration with another VS Code extension that I maintain called GistPad (https://aka.ms/gistpad). That way, if you want to create samples or share swings with others, you can simply use GitHub + VS Code to do it.