MEDIA POST -- Nov 29 -- In a move likely to spur the growth of mobile video, YouTube will allow subscribers of Verizon Wireless' V Cast media service to view a selection of videos on their mobile phones starting in early December. The deal marks YouTube's first major agreement with a wireless carrier and gives Verizon at least a temporary advantage over its competitors in trying to lure customers to sign up for lucrative data services. V Cast costs $15 a month.