New to Gulp , Sass and Browsersync ?
In above video you will learn how you can setup a Gulp build that will compile Sass for you, and automatically sync all changes to html, sass files, on save using Browser Sync.
Save your file, and the page is updated with changes.
Are you looking to start web development ?
If yes, this video will help you to create simplest Web Server using Node.js.
You can also learn how you can sync browser with your code, whenever you update code, it will reload browser automatically with latest changes using browser sync node package.