Facebook continues to build out its video ad platform by purchasing video ad tech company LiveRail. The acquisition means that Facebook users shouldn’t be surprised to see video ads based on your Facebook profile elsewhere across the Internet, as LiveRail is known for tailoring videos very specifically across platforms and sites. Publishers will benefit, as more relevant ads will help them make the most out of all the opportunities that they have across the web, but the creepiness factor might begin to creep in for users as they see the same videos everywhere.