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<html><body><h3>A demonstration of how to access a VIDEO element</h3><video id="myVideo" width="320" height="240" controls> <source src="movie.mp4" type="video/mp4"> <source src="movie.ogg" type="video/ogg"> Your browser does not support the video tag.</video><p>Click the button to get the duration of the video, in seconds.</p><button onclick="myFunction()">Try it</button><p id="demo"></p><script>function myFunction() { var x = document.getElementById("myVideo").duration; document.getElementById("demo").innerHTML = x;}</script></body></html>