All 3 are great videos on their own, no doubt about that.
My vote goes clearly to the 2nd one by korppis for a pretty simple reason:
It shows the diversity the best: Lots of cav, some ranged, siege towers, ladders... everything that is in crpg is in that trailer. It hasn't got the technical finesse like the 722-trailer but the footage is clearly the best overall.
...but all the effort should be rewarded. Therefore I'd like to see the 33%-solution implemented if possible. Every trailer deserves to be shown equally.