Apart from the content held in your HTML file (and maybe your custom CSS files and images), you will need the core of reveal.js. This contains the "dist" folder with css and js stuff along the themes and fonts, the "js" folder with more js stuff and the "plugin" folder with your selected ones. You can find all of them in your computer or in reveal.js's github. Be aware of the relative paths of your HTML files, that should point correctly to these other files.