To generate the html snippet to following thinks

1. goto url http://localhost:3000/admin/articles/new
2. enter url in body text box 3 click on the create snippet button on header
3. than create the article

If you want to show the snippet created by you than

1 Click on the button "Show all snippet" on the top of header 2 you will redirect to displays page 3 here by clicking on the show link you will get he video on image created by you