Evan Solomon

<a href="http://oembed.com/" rel="nofollow ugc">oEmbed</a> is an easy way to embed media. It turns links into embedded content automatically. WordPress has supported it in posts for a while, but not in comments. This plugin uses the oEmbed support already in WordPress and adds it to comments.

oEmbed in Comments

still works

WordPress supports oEmbed, but only in post content. This adds oEmbed support to comments.

lenasterg

Adds oEmbed support in WordPress posts, pages and custom post types for videos from https://video.sch.gr, school location map from https://maps.sch.gr sites of Greek Schools Network. 
There are no settings. Simply, add the URL in your content editor. 
For video embedding from https://video.sch.gr: Just paste the given “Απευθείας σύνδεσμος” link from the “Κοινοποίηση” section of a video from video.sch.gr into the content area and it will by transformed to oEmbed into your post, page or custom post type. 
* Example video: Copy https://video.sch.gr/asset/detail/n1rDHZIL7FEdoctIUjzKzPuS/t2NkiLSvRHDiSNaTtSVm2Dh6 and paste it into your post. 
* Example slideshow: Copy http://lterz.mmpres.sch.gr:4000/popcorn/1h and paste it into your post.
For school location map from https://maps.sch.gr: Find the school you want at https://maps.sch.gr. Right click on the marker and copy the text from the “Αντιγραφή συνδέσμου” textbox. Go into your WordPress post/page editor and paste the URL in a separate line. Publish the post/page and the map will be embedded.

Sch.gr Commons

Just copy/paste a URL of video from https://video.sch.gr, or a school location map from https://maps.sch.gr into your WordPress posts and see them emb …

oEmbed in Comments vs Sch.gr Commons