The New Version 4.4 Of Wordpress Oembed
time now, allowing users to easily embed content from other sites.
Starting with version 4.4, WordPress becomes an oEmbed provider as
well, allowing any oEmbed consumer to embed posts from WordPress
In order to achieve this, WordPress' oEmbed consumer code has been
enhanced to work
with any site that provides oEmbed data (as long as it matches some
strict security rules). For security, embeds appear within a sandboxed
iframe – the iframe content is a template that can be styled or
replaced entirely by the theme on the provider site."
The detailed article is at