You can insert hyperlinks to external webpages using the link tag within a paragraph. The pages are loaded in-app without the use of external applications, meaning it is easy to go back and forth between your document and the hyperlinked page. If you would like to insert a web page directly into your app, use a web view.
<p> This sentence contains a hyperlink <link url="https://www.youtube.com/watch?v=4krqhgAQ4Fg">here.</link> </p>
At this time, any hyperlinks that contain illegal XML characters will cause an error on publish. Simply replace the illegal characters in the hyperlink with the escaped character version, and your hyperlinks will work as expected.
" to " > to >
' to ' & to &
< to <