Pivotal Research analyst Brian Wieser noted that Australian trade publication AdNews found that Facebook (FB) claims to reach more 16-39 year-olds in the country than exist according to the country's census. His analysis of Facebook Ads Manager data compared to the U.S. consensus reveals a similar outcome. His talks with ad agency executives on this topic indicate that the gap between Facebook and census figures is not widely known, Wieser tells investors. The analyst, who keeps a Sell rating and $140 price target on Facebook, believes the primary winner of the social media giant's video expansion will be third party measurement firms, such as Nielsen (NLSN) and comScore (SCOR), he added.