This is a pretty cool description of how a web page is delivered on the Internet.
It's cool because it makes the process fairly easy to picture, but in reality it is much more complex for a sophisticated site like Lottery Post, because a web page doesn't just come from one server, and there are dozens or maybe even hundreds of "round trips" like the one described in the video to dozens of servers for every web page you see. For example, the web page you are viewing right now has elements that come from perhaps a dozen different servers from several companies.
A large part of my job is knowing how all these "pathways" for data and images from different servers will be requested for each page, and structuring the pages and requests so as many can happen as possible at the same time, in order to reduce the amount of time it takes for a page to assemble and load. Also, I try to structure pages so that the minimum number of requests can happen before a page can be shown to you and you can start to use it, even when there are parts of the page that have not finished loading. That's why you may see the browser's "loading" icon (a spinning icon) continue to spin even after you see the page for the first time.