Disclaimer: This blogpost is based on a sponsored Nikon event  Even though Nikon started the whole DSLR video thing, they have not really mastered the technology up until now. The Canon 5d, released some months after Nikons D90 2008 release, had much better video performance and got established as a true game changer. And the game has changed. Every pro DSLR is now expected to feature pro video, and the recently released D800 is made with the intent of taking on the Canoninzed videomarket. As some may know I am a Canon shooter, owning 5Ds and lots of lenses. But I still think its important…