Weston Ruter

<p>This plugin adds the <code>loading=lazy</code> attribute to <code>iframe</code> elements coming from oEmbeds. In WordPress 5.5, <code>loading=lazy</code> is added to images per <a href="https://core.trac.wordpress.org/ticket/44427" rel="nofollow ugc">#44427</a>, and in 5.7 it is being added to iframes as well per <a href="https://core.trac.wordpress.org/ticket/50756" rel="nofollow ugc">#50756</a>.</p>
<p>This plugin will be obsolete by the time WordPress 5.7 is released. When that happens, this plugin will do nothing.</p>


Lazy Loading oEmbed Iframes

Add the loading=lazy attribute to iframes coming from oEmbeds in content

wistia

<p>Wistia’s embed codes are designed to be very durable, but WordPress has a<br />
history of being particularly troublesome. This plugin adds oEmbed support so<br />
that pasting a link to the video’s page in Wistia will embed the video. The<br />
video’s URL must be by itself on its own line for this to work.</p>
<p>As of version 0.6 of this plugin, it is recommended that you check<br />
“Use oEmbed?” under Advanced Options when generating your embed code.</p>
<p>As of version 0.8 of this plugin, the legacy “Anti-Mangler” feature is an<br />
option that is turned off by default.</p>
<p>See the Wistia documentation for more:<br />
http://wistia.com/doc/wordpress#using_the_oembed_embed_code</p>
<h3>Automatic Installation</h3>
<ol>
<li>In Admin Dashboard, go to Plugins > Add New.</li>
<li>Search for “Wistia WordPress Plugin”.</li>
<li>Find the plugin and click “Install”.</li>
</ol>
<h3>Manual Installation</h3>
<ol>
<li>Make a ‘wistia-wordpress-oembed-plugin’ directory in ‘/wp-content/plugins/’.</li>
<li>Upload all files in the repository to the<br />
‘/wp-content/plugins/wistia-wordpress-oembed-plugin/’ directory.</li>
<li>Activate the plugin through the ‘Plugins’ menu in WordPress.</li>
</ol>


Wistia WordPress Plugin

Enables all Wistia embed types to be used in your WordPress blog.

Lazy Loading oEmbed Iframes vs Wistia WordPress Plugin