Eirudo

<p>Embed YouTube videos and keept their aspect ratio, just using simple shortcode.</p>
<ul>
<li>Simple shortcode, can be used in the posts or widgets.</li>
<li>Using default YouTube Embed Code (iframe), but make it responsive</li>
<li>Custom aspect ratio, if you want set different porpotion size.</li>
<li>Auto centered position. So if you insert it on your post section, the video always on center-aligned.</li>
<li>Lazy Load supported.</li>
<li>100% Free! And no ads or even trackers inside.</li>
</ul>
<h3>Arbitrary section</h3>
<h3>A brief Markdown Example</h3>
<p>Pros:<br />
1. Simple, only using shortcode to use for individual video each shortcode<br />
2. Lazy Load supported<br />
3. Custom parameters for advanced use</p>
<p>Cons:<br />
1. Only for simple use,not for advanced playlist. Embedding one video for each shortcode.</p>


Simple YouTube Responsive

Perfect

You can add a line to your functions.php to make videos responsive if you're doing your own theme. However, if you're not, this plugin works beautifully and gives other options like lazy load, etc. 

If doing your own theme, add: add_theme_support( 'responsive-embeds' );

Works Beautifully

Embed responsive YouTube videos using simple shortcode. Lazy Load supported.

jabedbd

<p>Simply Embed Youtube video with custom HTML5 Player as Video or Audio</p>
<h3>How to Use</h3>
<p>HTML5 Youtube Video is very easy to use. Just put the shorcode [varvideo]youtube video link[/varvideo] in your post or page where you want to embed the video.</p>
<p>you can also controll the video size with two parameter.<br />
[varvideo width=”500px” height=”300px”]youtube video link[/varvideo]<br />
or you can also % as size.<br />
for example:<br />
[varvideo width=”80%” height=”60%”]youtube video link[/varvideo]</p>
<p>From Version 1.0.1 you can access another paremeter named “type”;<br />
For embed as video: [varvideo width=”80%” height=”60%” type=”video”]youtube video link[/varvideo]</p>
<p>For embed as audio: [varvideo width=”80%” height=”60%” type=”audio”]youtube video link[/varvideo]</p>
<p>the defualt value of “type” parameter is “video”;</p>
<h3>Shortcode & Parameter</h3>
<p>Shortcode: [varvedeo][varvideo]</p>
<p>Parameters:</p>
<li>width: use any px value or % value</li>
<li>height: use any px value or % value</li>
<li>type: use “audio” or “video” as embed format</li>
<h3>Support</h3>
<p>For Any Type of Support Submit your Query Here:<br />
  http://vargrid.com</p>


HTML5 Youtube Player

Simply Embed Youtube video with custom HTML5 Player as Video and Audio

Simple YouTube Responsive vs HTML5 Youtube Player