Saw these on Arenajunkies a few days ago. Courtesy of Vanguards posting them.
Apparently Blizz had a media press in Korea, and some levelling footage was leaked. Just a bunch of random shit really.
vid 1- /watch?v=Ha6O_e-zCUw
vid 2 -/watch?v=Hn1OeGG9idI
vid 3 -/watch?v=hCj_gFWAtZQ
edit: mb already been posted on mainpage, didn't notice sorry