寻找一些帮助，以便在图片幻灯片中以youtube的形式将视频嵌入到项目编号4中。最终的结果应该是播放前3个图像，一旦它到达第4个项目，它应该自动播放视频，一旦视频完成，它应该在幻灯片放映的下一个图像上移动。
我的网站是www.serenitygardenrooms.com
我的代码片段无效：
<section id="home-slider" class="flexslider fullbg"
style="background-image:url(img/slide/home/1_1_.jpg); height:600px; padding:0px;">
花葶。范围。样式。语境。
<p class="home-slide-content bounceIn animated" data-wow-delay="0.5s" data-wow-duration="10s">
We <span class="highlight">build</span> it
</p>
</div>
</li>
<li class="home-slide">
<div class="flex-caption transparent light-font center flexslider fullbg" style="background-image:url(img/slide/home/2.jpg); height:600px; width:100%; padding:0px; margin-top:0px;">
<p class="home-slide-content bounceInLeft animated" data-wow-delay="0.5s" data-wow-duration="10s" style="margin-top:150px;">
Scape. <span class="highlight">Scope.</span> Style.<span class="highlight"> Context.</span>
</p>
<p class="home-slide-content bounceIn animated" data-wow-delay="0.5s" data-wow-duration="10s">
We <span class="highlight">build</span> it
</p>
</div>
</li>
<li class="home-slide">
<div class="flex-caption transparent light-font center flexslider fullbg" style="background-image:url(img/slide/home/3.jpg); height:600px; width:100%; padding:0px; margin-top:0px;">
<p class="home-slide-content bounceInLeft animated" data-wow-delay="0.5s" data-wow-duration="10s" style="margin-top:150px;">
Scape. <span class="highlight">Scope.</span> Style.<span class="highlight"> Context.</span>
</p>
<p class="home-slide-content bounceIn animated" data-wow-delay="0.5s" data-wow-duration="10s">
We <span class="highlight">build</span> it
</p>
</div>
</li>
<li class="home-slide">
<div class="flex-caption transparent light-font center flexslider fullbg" style="background-image:url(img/slide/home/4.jpg); height:600px; width:100%; padding:0px; margin-top:0px;">
<iframe src="https://www.youtube.com/watch?v=WyjK8mjhjb4?autoplay=1" width="100%" height="600px" frameborder="0" allowfullscreen></iframe>
</div>
</li>