<button onclick="getPlaySpeed()" type="button">What is the playback speed?</button> <button onclick="setPlaySpeed()" type="button">Set video to be play in slow motion</button> <br> <video id="video1" controls="controls"> <source src="/statics/demosource/mov_bbb.mp4" type="video/mp4"> <source src="/statics/demosource/mov_bbb.ogg" type="video/ogg"> Your browser does not support HTML5 video. </video> <script> myVid=document.getElementById("video1"); function getPlaySpeed() { alert(myVid.playbackRate); } function setPlaySpeed() { myVid.playbackRate=0.5; } </script> <p>Video courtesy of <a href="http://www.bigbuckbunny.org/" target="_blank">Big Buck Bunny</a>.</p>