[shems]

I think there should be a law against overdubbing random music over belly dance clips. Whatever the music is that's playing, it is definitely not the music she was originally dancing to. Without knowing what the original music was it's hard to tell a whole lot more about it. It could be some sort of special vignette, but it's hard to say. Maybe she just felt like wearing an eccentric hat?

As far as the dancer goes, this is Tanyeli, a pretty famous Turkish dancer. There are tons of other clips of her on youtube. Her dancing in this clip, despite the overdub, the long title of the clip, and the odd hat still looks pretty Turkish to me.