Javascript 使用按需脚本更改播放视频

出于某种原因，我博客上的youtube视频切换器在视频更改后不会播放视频，这与我用来加快页面加载时间的youtube嵌入脚本有关。完整的例子在这里，请帮忙，我一直在谷歌上搜索这个

HTML:

<div style='text-align:center'>Select a video to watch: <select onChange="playVideo(this)"><option value="v09">Best of the Web - 2013</option><option value="v01">People are Awesome - 2013</option><option value="v08">JP Auclair Street Segment - All.I.Can</option><option value="v07">Natural Phenomena time lapse</option><option value="v06">Welcome, your new Mac - Apple</option><option value="v05">Yosemite Range of Light time lapse</option><option value="v04">Train Yard bike stunts @ TD</option><option value="v03">7 Billion People - Nat. Geo.</option><option value="v02">I love the Whole World - Discovery</option></select><div id='videoPlayback'><div class="videoWrapper"><div class="youtube" id="1-8isxa5B_Y" style="width:671px;height:402px;"></div></div></div>

<script type='text/javascript'>function playVideo(c){c=document.getElementById(c.value);b=document.getElementById("videoPlayback");b.innerHTML=c.innerHTML};</script><script src='//millerext.googlecode.com/svn/youtube' defer></script>

选择一段视频观看：网络最佳-2013年人人都很棒-2013年JP Auclair Street Segment-All.I.自然现象延时欢迎，你的新Mac-AppleYosemite系列光延时火车站自行车特技@TD70亿人-Nat。我爱整个世界-探索

JS:

<div style='text-align:center'>Select a video to watch: <select onChange="playVideo(this)"><option value="v09">Best of the Web - 2013</option><option value="v01">People are Awesome - 2013</option><option value="v08">JP Auclair Street Segment - All.I.Can</option><option value="v07">Natural Phenomena time lapse</option><option value="v06">Welcome, your new Mac - Apple</option><option value="v05">Yosemite Range of Light time lapse</option><option value="v04">Train Yard bike stunts @ TD</option><option value="v03">7 Billion People - Nat. Geo.</option><option value="v02">I love the Whole World - Discovery</option></select><div id='videoPlayback'><div class="videoWrapper"><div class="youtube" id="1-8isxa5B_Y" style="width:671px;height:402px;"></div></div></div>

<script type='text/javascript'>function playVideo(c){c=document.getElementById(c.value);b=document.getElementById("videoPlayback");b.innerHTML=c.innerHTML};</script><script src='//millerext.googlecode.com/svn/youtube' defer></script>

function playVideo（c）{c=document.getElementById（c.value）；b=document.getElementById（“视频回放”）；b.innerHTML=c.innerHTML}；

正如您所见，要获得点播视频，您必须使用外部网站的脚本，通过以下方式调用该脚本：

<script src='//millerext.googlecode.com/svn/youtube' defer></script>

然后将该代码插入交换视频时运行的脚本，即：

function playVideo(a) {
        a = document.getElementById(a.value);
        b = document.getElementById("videoPlayback");
        b.innerHTML = a.innerHTML;  

        /**ondomandcode**/

我将代码添加到您创建的JSFIDLE中：