dustinscarberry

This plugin allows embedding galleries of YouTube videos within any post or page within your site. Just install and start creating.
Features Include:
<ul>
<li>Unlimited video galleries (YouTube and Vimeo support)</li>
<li>Set size of video player</li>
<li>Set progress bar color of video player</li>
<li>Order video albums by newest or oldest videos first, as well as custom re-ordering of videos / albums</li>
<li>Ability to display albums or just videos</li>
<li>Use either square or rectangle thumbnails for videos</li>
<li>Add YouTube and Vimeo playlists to albums</li>
<li>Publish and un-publish videos and albums without having to delete them</li>
<li>And more…</li>
</ul>

uTubeVideo Gallery

Display unlimited galleries of YouTube videos in any post or page within your site.

ikanaweb

Activate this plugin and reduce you page weight by nearly 1mo !
Because embed videos can dramatically increase your page weight and loading time, Embed Video Thumbnail 
automatically replace them by their corresponding thumbnail. Videos will then only be loaded after click on thumbnails.
This plugin fixes part of the following “defer parsing of javascript” error in GTmetrix :
<blockquote>
xxxx MiB of JavaScript is parsed during initial page load. Defer parsing JavaScript to reduce blocking of page rendering.
</blockquote>
Currently supported video hosting services :
<ul>
<li>Youtube</li>
<li>Vimeo</li>
<li>Dailymotion</li>
<li>Facebook</li>
</ul>
Optional settings :
<ul>
<li>Toggle activation on each hosting services</li>
<li>Toggle activation by device (desktop, tablet, mobile)</li>
<li>Copy thumbnail on local server for performance improvements</li>
<li>Display video title over the thumbnail</li>
<li>Toggle video loop on Vimeo and Youtube</li>
<li>Import/export settings</li>
</ul>
Widget :
You can use our Embed Video Thumbnail widget to transform your videos in sidebars.
Custom hosting services can be added with the <code>ikevt_extension_providers</code> hook. 
Each hosting service extension must implement <code>Ikana\EmbedVideoThumbnail\Provider\ProviderInterface</code>
Requirements :
<ul>
<li>php 5.6+</li>
</ul>

Embed Video Thumbnail

Automatically replace embed videos everywhere with their thumbnail to reduce page load time and improve your GTmetrix score.

uTubeVideo Gallery vs Embed Video Thumbnail