Do Straightening Hair Brushes Straighten Hair?

In this video I'm doing a review of a straightening brush set that claims to make hair super straight, and super smooth. The brand is called My Makeup Brush Set and it's not a professional brand by any means. 

At first I try it out on my mannequin head, then on myself. 

Although it doesn't straighten the hair like a flat iron, I may suggest it to those of you with unruly curly hair. It may help to tame the frizz and possibly "prep" the hair for a flat iron or blow-out.