Every year's biggest E3 highlights tend to be concentrated in the three marquee keynotes — those carried out by Nintendo, Microsoft and Sony — and one of them has now been posted online in its full glory for repeat consumption. Microsoft's Xbox Media Briefing from Monday includes a deluge of new things to get excited about, such as the return of Master Chief, a teaser for the next instalment of the Gears of War franchise, new languages for Kinect voice controls, and of course, the introduction of the SmartGlass companion app. If you don't quite have the full hour and 50 minutes to digest it all, may we suggest our two-minute summary video below?