XTreme Video, a multiplatform network for extreme athletes and creators, has hired of two key executives to further expand its North American business and the introduction of YouTube’s top BMX creator, Adam LZ, to its network. Gregg Bywalski, who joins the company from AB Group, will be the general manager of XTremEnterprise, the holding group for Xtreme Video. Dan Aufhauser, whose portfolio includes forging media relations and entertainment partnerships with Google, Starbucks and GoPro, joins as director of Media and Business Development for the U.S. market.