Kevin Leary

<p>This plugin will automatically resize your WordPress auto-embeds, including video and other iframes, in a responsive fashion. It currently supports the following providers:</p>
<ul>
<li>YouTube</li>
<li>Vimeo</li>
<li>DailyMotion</li>
<li>Blip.tv</li>
<li>Viddler</li>
<li>hulu.com</li>
<li>Revision 3</li>
<li>Funny or Die</li>
<li>WordPress.tv</li>
<li>Scribd</li>
</ul>
<h4>Live Example</h4>
<p><a href="http://www.kevinleary.net/responsive-video-embeds-plugin-example/" rel="nofollow ugc">Visit the test page</a> where you can resize the browser and watch the videos automatically scale to fit the resolution.</p>
<h4>About WordPress Auto-embeds</h4>
<p>WordPress has a nifty auto-embed feature, allowing authors to automatically turn a link to a video embed into a video player when a post is viewed. To turn this feature on check the <strong>Auto-embeds</strong> check box in <strong>Administration > Settings > Media SubPanel</strong>.</p>
<h4>Under the hood</h4>
<p>Please note that this plugins modifies the output of <code>modify_embed_output</code> filter, adding HTML & CSS to make the magic happen.</p>
<p>Credit for the method used in this plugin goes to <a href="http://amobil.se/2011/11/responsive-embeds/" rel="nofollow ugc">Anders M. Andersen</a> for crafting the method used to gracefully resize the embeds.</p>
<p>Create and maintained by <a href="http://www.kevinleary.net/" rel="nofollow ugc">Kevin Leary</a>, a WordPress developer living in Boston, MA.</p>
<h4>Multisite Compatibility</h4>
<p>The <em>Responsive Video Embeds</em> plugin is compatibly with WordPress Multisite, just use the <a href="https://codex.wordpress.org/Create_A_Network#WordPress_Plugins" rel="nofollow ugc">Network Activate</a> feature to enable responsive video resizing embed on every site. If you only want responsive video resizing to happen on a specific site, activate the plugin for that site only.</p>


Responsive Video Embeds

Automatically resize WordPress auto-embeds, including video and other iframes, in a responsive fashion.

Automattic

Donncha O Caoimh (a11n)

Michael Adams (mdawaffe)

<p>Unfiltered MU gives Administrators and Editors the <code>unfiltered_html</code> capability.  This prevents WordPress MU/WordPress 3.0 multisite from stripping <code><iframe></code>, <code><embed></code>, etc. from these users’ posts. Authors and Contributors do not get this capability for security reasons.</p>
<p>The plugin can either be used globally for your entire MU site, or it can be applied on a blog-by-blog basis.</p>
<p>For WordPress MU or WordPress 3.0 multisite only. Regular WordPress already offers this feature and does not need this plugin.</p>
<p>Warning! This is a very dangerous plugin to activate if you have untrusted users on your site. Any user could add Javascript code to steal the login cookies of any visitor who runs a blog on the same site. The rogue user can then inpersonate any of those users and wreak havoc. If all you want is to display videos on your WordPress MU blogs, use the native <a href="https://codex.wordpress.org/Embeds" rel="nofollow ugc">Embed Support</a>, <a href="https://wordpress.org/extend/plugins/vipers-video-quicktags/" rel="ugc">Viper’s Video Quicktags</a> or any of the other <a href="https://wordpress.org/extend/plugins/tags/video" rel="ugc">video plugins</a> on WordPress.org.<br />
If you use this plugin your site will be hacked in one way or another if you allow anonymous users on the Internet to create blogs on your site. It’s very dangerous.</p>
<p>Are you still 100% sure you want to use this plugin?</p>


Unfiltered MU

I love when plugins are so cleanly written and do their trick without hassle. Especially after 8 years of no updates. Though they should submit an update just to remove the "2 years old" warning...

Still works! March 2017

This WordPress MU/WordPress 3.0 multisite plugin gives blog Administrators and Editors the ability to post whatever HTML they want.

Responsive Video Embeds vs Unfiltered MU