Weston Ruter

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>.
This plugin will be obsolete by the time WordPress 5.7 is released. When that happens, this plugin will do nothing.

Lazy Loading oEmbed Iframes

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

Mark Wilkinson

Highrise Digital

This plugin provides page optimisations for pages and posts which have embedded Youtube, Vimeo or Daily Motion videos which have been added using the core embed block.
Without this plugin, when using the core embed block, when your page loads, lots of external scripts and styles are loaded from the embed service, regardless of whether a visitor actually interacts with the embedded video.
This plugin prevents these scripts and styles from loading until the user actually interacts with the video. It does this by replacing the video embed, on page load with the video thumbnail image (added on Youtube, Vimeo or Daily Motion). When a user clicks the thumbnail the embedded video, along with associated scripts and styles are loaded.
<iframe loading="lazy" class="youtube-player" width="750" height="422" src="https://www.youtube.com/embed/k7A2kZWUb9Q?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox"></iframe>

Better Core Video Embeds


This is an example of an excellent plugin. Just activate and get immediate enhancement when using the embed blocks from WordPress. If deactivated, everything still works as before, but then without the enhancement. No "lock in":


Does what it says without any fuzz. Very good!

A plugin which enhances the core embed block for Youtube, Daily Motion and Vimeo videos by not loading unnecessary scripts until they are needed.

Lazy Loading oEmbed Iframes vs Better Core Video Embeds