This tiny button on the Facebook app could start bringing in big money (FB)

Facebook has been testing the introduction of a dedicated video tab inside its mobile app among a select group of users over the past year — a move Morgan Stanley analysts predict will help the social network capture a greater share of the TV ad market.
The tab, which appears at the center of the bottom menu within Facebook's mobile app (for some users), opens up a video discovery hub, where users can view popular live videos from around the world and content from their friends.
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