Check out example codes for "load webpage without crashing C#". It will help you in understanding the concepts better.

Code Example 1

public void LoadDocument(string html, string link)
{
  	string html = "<html><head>";
  	html += "<meta content='IE=Edge' http-equiv='X-UA-Compatible'/>\n" +
      "\n<body>" +
      "<iframe id='video' src='{0}' width='600' height='600' frameborder='0'></iframe>\n" +
      "</body>";
  webBrowser1.DocumentText = string.Format(html, link);
}

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