A video-centric site doubling as an agent directory and listing portal is the new real estate tool on the block. RealBiz Media Group has announced its national launch of Nestbuilder.com, according to Inman. “Nestbuilder.com’s mission is to both empower the real estate agent and to connect the homeowner/homebuyer directly with the agent in a personalized and meaningful relationship without interference from large, impersonal, third-party lead generation sites,” said Steve Marques,…