Youtube is "filtered" in multiple places. Tone it down to one place for one URL, or make it possible to set a level of importance to re-categorized urls.
i.e. Social Web- Youtube does not stop youtube HTTPS traffic no matter how you setup your network agent/firewall/asa. Log refers to it as a search engine/portal as well as social web, and streaming media. Simply putting it in one category would be super useful or make it so in the recategorizing setup you can setup inheritance properties so you can designate which rule to follow "j.i.c."
Please