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<html> <body> <video id="myVideo" width="320" height="176" controls oncanplaythrough="myFunction()"> <source src="mov_bbb.mp4" type="video/mp4"> <source src="mov_bbb.ogg" type="video/ogg"> Your browser does not support HTML5 video.</video><script>function myFunction() { alert("Can play the video without buffering");}</script> <p>This example demonstrates how to use the "oncanplaythrough" attribute on a VIDEO element.</p><p>Video courtesy of <a href="https://www.bigbuckbunny.org/" target="_blank">Big Buck Bunny</a>.</p></body> </html>