By Alexei Oreskovic SAN FRANCISCO (Reuters) – Facebook Inc is acquiring video advertising company LiveRail in the Internet social networks latest step to make video ads a bigger part of its business. Facebook did not disclose a price for the San Francisco-based company, which was founded in 2007 and has offices in several countries. LiveRails technology automatically pairs video ads with the videos that appear on many websites, such as the sites for Major League Baseball, ABC and AE Networks. Facebook would not discuss plans for using the technology on its own website.