Is there a way to only allow video embeds internally, i.e. within the site, while disallowing external video embeds? This is an important security issue because we have malicious, banned users embedding videos elsewhere in order to give our users a lot of abuse. I thought of checking the referrer in the VideoController.php file but I'm not sure if external videos embeds are relying upon my site's code. The video embed uses the web address: https://static.ning.com/YOURSITENAME/widgets/video/flvplayer so I'm not sure if it even uses any code I have control over.
Did you ever find a solution to your problem? I have a private network where I do not want the video content to be embedded elsewhere on the internet. Looking forward to your feedback!