youtube api 사용해서 youtube hd 재생

<iframe id="player" src="https://www.youtube.com/embed/s4oO-CWTFV4?enablejsapi=1&amp;autoplay=1&#10;&amp;controls=1&amp;modestbranding=1&amp;showinfo=0&amp;rel=0&#10;&amp;theme=light&amp;iv_load_policy=3" frameborder="0" allowfullscreen="1" width="853" height="480">

</iframe>

<script>

var tag = document.createElement('script');

tag.src = "https://www.youtube.com/iframe_api";

var firstScriptTag = document.getElementsByTagName('script')[0];

firstScriptTag.parentNode.insertBefore(tag, firstScriptTag);

var player;

function onYouTubeIframeAPIReady(){player = new YT.Player('player',{events:{'onReady': onPlayerReady}});}

function onPlayerReady(event){event.target.setPlaybackQuality('hd1080');}

</script>