The most commonly used way of doing this is to embed the HTML page as an iframe. Here is the example.
new sap.ui.core.HTML({ preferDOM: true, content: "<iframe src='https://www.yourdomain.com'></iframe>" });
It can also be loaded using AJAX call or display using sap.ui.core.HTML, but it will depend upon your HTML page.