ok, but this one is not valid though
vendor/videojs/video.js/dist/video-js/vjs.youtube.js
video.js can't be a directory right? Here is my screenshot
and the source code
<html>
<head>
<link href="//vjs.zencdn.net/4.10/video-js.css" rel="stylesheet">
<script src="//vjs.zencdn.net/4.10/video.js"></script>
<script src="videojs_youtube.js"></script>
</head>
<body>
<div id="videoContainer" class="ImageViewerContent tab-pane fade in">
<video id='videoPlayer' class="video-js vjs-default-skin vjs-big-play-centered"
data-setup='{ "techOrder": ["youtube"],
"src": "www.youtube.com/watch?v=v2AC41dglnM",
"preload":"auto",
"controls":true,
"poster":"https://i.ytimg.com/vi/v2AC41dglnM/hqdefault.jpg",
"width":450,
"height":254
}'>
<p class="vjs-no-js"><?php echo PRODUCT_VIDEO_NOT_SUPPORTED; ?></p>
</video>
</video>
<script type="text/javascript">
document.createElement('video');document.createElement('audio');document.createElement('track');
</script>
</body>
</html>
The youtube plugin is from here.