I don't know the answer.
I don't think Bright Cloud would be used.
If you look at the other shaping options, like You Tube, etc, you'll start to get the impression they are not so much categories but very specific sets of web applications.
So I think this will use the layer 7 application database. I think these will contain very specific domain names and layer 7 inspection and the like, and this will be used for the shaping rules.