How to parse a dynamic web page?

Question

Parsing

There is a site where more content appears only when you scroll down to the bottom of the page, like in YouTube. So what should I do to get the code of the page by scrolling the content multiple times? I use C# language.

Answer 1

If you don't know the web, then no way.
You need to figure out how the page works - there must be some kind of javascript that handles the scrolling and sends a request to the next portion of the page.
Therefore, you can see what request it sends, and execute these requests yourself, specifying the parameters.
But for such reverse engineering, you need to at least understand javascript and http/https