Implementing Traffic prioritization for video streaming

I have not touched this yet, but have a need to implement layer7 traffic prioritization to give HTTP & HTTPS traffic priority over all forms of video streaming that utilize port 80. I was looking through the wiki and have not found a signature to mark Flash, Quick Time, etc… Is there a resource where I can find the signatures and documentation necessary to implement this type of layer7 traffic shaping?

I found this signature at the sourceforge l7 project. Is it as simple as creating a new signature with the following:

[FC]WS[\x01-\x09]|FLV\x01\x05\x09