private void DisplayHtml(string html, Formatter formatter)
{
if (htmlPath == null)
htmlPath = TempFileManager.Instance.CreateTempFile("video.html");
html = formatter(html);
html = HTMLDocumentHelper.AddMarkOfTheWeb(html, "about:internet");
FileHelper.WriteFile(htmlPath, html, false, Encoding.UTF8);
previewBox.Navigate(htmlPath);
}