Puvox Software

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DEPRECIATED. YOU CAN USE: <a href="https://wordpress.org/plugins/external-url-as-post-featured-image-thumbnail/" rel="ugc">Youtube Thumbnail as Featured Image/</a>.
<h4>Available Options</h4>
See all available options and their description on plugin’s settings page.

Set Youtube Thumbnail as Featured Thumbnail

DEPRECIATED. YOU CAN USE: https://wordpress.org/plugins/external-url-as-post-featured-image-thumbnail/

Archivarix

Archivarix External Images Importer will scan your posts and pages for external urls in src/srcset attribute for all img tags. Based on configured settings it can:
<ul>
<li>Download images from their external locations</li>
<li>Download images from Internet Archive (Wayback Machine)</li>
</ul>
You can choose what to do with images that could not be retrieved from external sources.
For further information and instructions please see <a href="https://archivarix.com/en/wordpress/" rel="nofollow ugc">Archivarix WP Plugin</a>

Archivarix External Images Importer

Works great!
I imported several posts into a site running WordPress 5.9.3 with Gutenberg and the Archivarix External Images Importer plugin imported the external images without any issues. I've tested a few other image importer plugins but none of them had the ability to scan a site and import from existing content like this one does.

Works with Gutenberg

Import external images in posts and pages from its original external sources or Web Archive if original source is unavailable.

Set Youtube Thumbnail as Featured Thumbnail vs Archivarix External Images Importer