Simon Wheatley

Fix for WordPress oEmbeds for various services which now provide https URLs, these aren’t recognised by the WP 3.4.2 list of oEmbed providers. Significant thanks to John James Jacoby for the code in his patch.
Development for this plugin is managed in the <a href="https://github.com/simonwheatley/HTTPS-oEmbed-Providers" rel="nofollow ugc">Github repository</a>.
See: https://core.trac.wordpress.org/ticket/20102

HTTPS oEmbed Providers

Fix for WordPress oEmbeds for various services which now provide https URLs, these aren't recognised by the WP 3.4.2 list of oEmbed providers.

cubecolour

A simple and lightweight plugin to indicate external http and https links in posts, pages and custom content by appending a small diagonal arrow icon to the link.
No configuration is required just install and activate.

Indicate External Links

Very reliable has survived many Wp updates and just keeps working.

This plugin just keeps on working

Indicates external links in post, page and custom content.

HTTPS oEmbed Providers vs Indicate External Links