You can edit / change the code and click run button
<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/> <title>HTML iFrame</title> <script>var clicky_site_ids = clicky_site_ids || []; clicky_site_ids.push(101319977);</script><script async src="//static.getclicky.com/js"></script></head> <body> <h2>Example HTML iFrame allowFullScreen</h2> <iframe width="454" height="210" src="https://www.youtube.com/embed/UgBWSPD6MUU" frameborder="0" allowfullscreen></iframe> <h2>Depends on your browser you may or may not see the fullscreen output</h2> <b>Browser Support</b> <ul> <li>Chrome : 17 </li> <li>Safari : 9.0 </li> <li>IE : <b style="color:red;">Not supported</b></li> <li>Safari : 7 (webkitallowfullscreen)</li> <li>Opera : <b style="color:green;">Supported</b></li> </ul> </body> </html>