Why does facebook need this...? Does it further their mission (statement) to "bring the world closer together"? https://www.facebook.com/zuck/posts/10154944663

Why does facebook need this...? Does it further their mission (statement) to "bring the world closer together"? https://www.facebook.com/zuck/posts/10154944663901634 https://www.facebook.com/zuck/posts/10154944663901634 Or is this a sophisticated way of tracking/analysing what people are doing in their personal videos so that Facebook can target people with more Ads?