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<!DOCTYPE html> <html> <body> <p>Click the button to create a VIDEO element with controls that will play a movie in a .mp3 or .ogg file format (depending on browser support).</p> <button onclick="myFunction()">Try it</button> <script> function myFunction() { var x = document.createElement("VIDEO"); if (x.canPlayType("video/mp4")) { x.setAttribute("src","movie.mp4"); } else { x.setAttribute("src","movie.ogg"); } x.setAttribute("width", "320"); x.setAttribute("height", "240"); x.setAttribute("controls", "controls"); document.body.appendChild(x); } </script> </body> </html>