<!--
Причем для отложенной загрузки iframe YouTube можно юзать плагин LazyLoader
тогда код будет таким:
<div class="videoWrapper" style="left: 0; width: 100%; height: 0; position: relative; padding-bottom: 56.2493%;">
<iframe iframe src="https://www.youtube.com/embed/urhNZz_Wddg?byline=0&badge=0&portrait=0&title=0&branding=0&autoplay=1&controls=1&disablekb=1&allowfullscreen=1" style="border: 0; top: 0; left: 0; width: 100%; height: 100%; position: absolute;" allowfullscreen scrolling="no"></iframe>
</div>
Настройки на стороне плагина:
http://bit.ly/2kkoicm
-->
<div class="videoWrapper" style="left: 0; width: 100%; height: 0; position: relative; padding-bottom: 56.2493%;">
<iframe iframe data-iframely-url="https://www.youtube.com/embed/urhNZz_Wddg?byline=0&badge=0&portrait=0&title=0&branding=0&autoplay=1&controls=1&disablekb=1&allowfullscreen=1" style="border: 0; top: 0; left: 0; width: 100%; height: 100%; position: absolute;" allowfullscreen scrolling="no"></iframe>
<!-- iframe data-iframely-url="https://www.youtube.com/embed/urhNZz_Wddg?byline=0&badge=0&portrait=0&title=0&branding=0&autoplay=1&allowfullscreen=1" style="border: 0; top: 0; left: 0; width: 100%; height: 100%; position: absolute;" allowfullscreen scrolling="no"></iframe -->
</div>
<script async src="//cdn.iframe.ly/embed.js" charset="utf-8"></script>