Trigger Drupal.attachBehaviors() when Media is rendered in ckeditor

Problem/Motivation

When rendering media inside ckeditor Drupal.attachBehviors() should be triggered on the media item to initialize any js that may be attached on the media.

I've run into this when embedding remote video players and trying to make them resize properly using fitVids.

Or is there a way I can trigger my own js when a media item is rendered inside ckeditor?