When I first watched this I suddenly forgot that Jerry Nelson passed away and Matt Vogel was to take over... Then a few seconds later I remembered, and started asking myself, "is that Jerry or Matt?" But then I noticed a slight difference in The Count's voice.
I am mixed about the video. Aside from being the secret video and the historical first time we heard Matt as The Count, it feels like a typical Count segment. Maybe it'll grow on me if I see it more, but I'm not too big a fan of the Sesame Street viral videos (the main exceptions being Cookie Monster's SNL audition, Share It Maybe, and What We Are Anthem, and even then I don't watch those often). But I pretty much felt the same way about the Muppet viral videos at first, until Muppet Bohemian Rhapsody came out. But if Jerry was still alive and active as The Count, or if we had been used to Matt's Count voice, or if they just decided to post this online without the "billion views promotion", I'd just say it's a decent segment and move on.
Of course, if there is ever a video spotlighting The Best of The Count, this should be a bonus feature.
Didn't see it mentioned in this thread, but The Count did a blog post about it:
http://youtube-global.blogspot.com/2013/03/zero-makes-counting-billion-times-more.html
I wonder who actually wrote it. Matt Vogel? One of the usual writers? Somebody else?