Dual Blade Question & Answer Part 2

(nowhere to post this and didn't want to create a new thread)

Seemingly official video: http://www.youtube.com/watch?v=6lM-_RD0bbs

I think it's official because the character control is very Nexon-y (having no idea how to play the character), and the user has a bunch of other evan videos like that that also seem official.
It looks like 4th job dual blader is called "blade master." Also, lol at the player getting spammed with "You are not high enough to use this skill" when trying to flying assaulter while jumping up to another platform =/ I wonder what that owl earring icon-thing that dropped is.

Was that Block Party flag in any other Nexon screen?
Kind of surprised its showing up now.