This DVD is not designed solely for belly dancers, but the techniques are applicable to poi spinning in bellydance, and there is a section on veil poi.
I'm sure we all know that poi and veil poi are not traditional to belly dance (they're originally from the Maori of New Zealand), but then nothing about Tribal Fusion is traditional! Slow motion is used to help clarify moves, and everything it taught in front of a mirror so you get a good view.