I absolutely loved
33's robot reveal video this year, for a variety of reasons-- excellent song choice, some good syncing, and an excellent robot.
I'd say the all time best for me though is still Robonaut's 2013-- the video that, at least for me, proved that robot reveal videos could be something other than dubstep laden dropfests or classic rock swagger. To this day, even though I dislike the song, I still get a smile on my face when I hear "Can't Hold Us" on the radio or at a party. The video was just that darn good. There was a genuine artistry that I don't think many reveal videos have that makes it unforgettable for me.