YouTube announced YouTube Gaming yesterday (June 12, 2015). YouTube Gaming is going separate app, website, and division of YouTube to where search algorithms only bring back gaming related content. However, it seems YouTube is most excited about the live stream features. The popular live streaming site, Twitch.tv, may be in trouble because of this YouTube launch.
You can find more info YouTube posted about YouTube Gaming here: http://youtube-global.
YouTube is planning to reveal more information during E3 this week.