The video was taken from the tokyo game convention, where gameloft introduced the game
 
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The Modern combat 4 picture that was leaked online turns out to be a fake, the image is from battlefield 2, although it wouldve been awesome :(
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MC4 Fake
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Battlefield 2: Vietnam
 
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Modern Combat 4 was spotted on gamelofts social application "Gameloft Live" From the user HKG_TVB, Seems like they started Beta testing ;)

 
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"The momentum of the smartphone and tablet market should continue to sustain Gameloft's growth in the upcoming quarters. Gameloft invests heavily in this segment and these investments should continue to bear fruit. The company intends to launch around twenty new games targeting all audiences in the second half of 2012 including the highly anticipated Wild Blood, Gameloft's first Unreal game, Modern Combat 4,Playmobil PiratesMy Littlest PetshopZombiewood and Heroes of Order & Chaos. As a comparison, the company launched eleven new smartphone and tablet games in the first half of 2012. "

Via http://www.droidgamers.com/index.php/game-news/android-game-news/4557-the-gameloft-report-modern-combat-4-wild-blood-my-little-pony-and-more-coming-this-year