Create a Landing Page \\ WordPress Beaver Builder Tutorial

Nice video! There is something I don't understand, this landing page is build on your website? But isn't a landing page a page where people come onto and can watch a video and if they are interested, they can click a button that redirects them to your website. Now it looks like this is a page on your website?

I am currently torn between going for beaver builder/divi/elementor for web design startup, I like the idea of white label with Beaver but the cost is higher obviously.. hmm..