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.

Ciprian

<p>Display a YouTube player (with an optional playlist) on any post or page using a simple shortcode. The plugin supports a static YouTube player (no video title) and a dynamic one (video title) using the YouTube Data API v3.</p>
<p>Embedded players must have a viewport that is at least 200px by 200px. If the player displays controls, it must be large enough to fully display the controls without shrinking the viewport below the minimum size. We recommend 16:9 players be at least 480 pixels wide and 270 pixels tall.</p>
<p>The YouTube player is responsive and it will work on all themes and screen sizes!</p>
<ul>
<li>Uses a simple shortcode which can be used in posts, pages, custom post types, widgets, reusable blocks.</li>
<li>Uses the default YouTube Embed Code (iframe) with optional privacy-enhanced mode.</li>
<li>Uses correct aspect ratio for videos using a Fluid Video technology.</li>
<li>Uses native HTML5 Lazy loading.</li>
<li>Used modern code and is optimised for speed.</li>
<li>100% free with no ads inside.</li>
</ul>
<h3>Static Playlist Player for YouTube</h3>
<p>Example: <code>[yt_playlist mainid="xcJtL7QggTI" vdid="xcJtL7QggTI, AheYbU8J5Tc, X0zGS4-UKgg, 74SZXCQb44s, 2M0XCH9q3YI, CTNgVQGLy24, B8RpvoHsgI8"]</code></p>
<h3>YouTube V3 API Playlist Player</h3>
<p>Example: <code>[yt_playlist_v3 mainid="xcJtL7QggTI" vdid="xcJtL7QggTI, AheYbU8J5Tc, X0zGS4-UKgg, 74SZXCQb44s, 2M0XCH9q3YI, CTNgVQGLy24, B8RpvoHsgI8"]</code></p>
<h3>YouTube Channel Feed with Lightbox Player</h3>
<p>Example: <code>[yt_feed channels="UCpVm7bg6pXKo1Pr6k5kxG9A" results="9"]</code></p>
<p>Check out the <a href="https://getbutterfly.com/wordpress-plugins/youtube-playlist-player/" rel="nofollow ugc">official Playlist Player for YouTube website</a> and a <a href="https://getbutterfly.com/wordpress-plugins/youtube-playlist-player/" rel="nofollow ugc">Playlist Player for YouTube demo</a>.</p>
<p>Check out a <a href="https://kmproperty.ie/buy/videos-virtual-tours/" rel="nofollow ugc">Property Videos & Virtual Tours</a> demo.</p>
<p>Check out more <a href="https://getbutterfly.com/wordpress-plugins/" rel="nofollow ugc">WordPress plugins here</a>.</p>


Playlist Player for YouTube

Display a YouTube player (with an optional playlist) on any post or page using a simple shortcode.

Simple YouTube Responsive vs Playlist Player for YouTube