User blog comment:Plexioth- xD/Monster Hunter 3 Ultimate/@comment-4697011-20120422095738/@comment-1006487-20120423152150

There is expensive direct feed capture stuff for the 3DS you can borrow from Nintendo/the company that is creating it for Nintendo if you are a huge gaming press site/magazine/.... That is how these videos are captured (this devices are also used for official trailers and the like).