There's not a whole lot to say about this, just like there isn't a whole lot to say about the Ocarina of Time on the 3DS. Let's try it anyway:
Well, this is The Legend of Zelda: Ocarina of Time. The trick is that it's a remake of the Nintendo 64 game on the Nintendo 3DS. Um, yeah. It's in 3D. It's a really good game from years ago. You play as Link. Yeah, Zelda is a princess. Anyways, in this video Link is riding Epona, his horse.
Why is the horse called Epona? I don't know. Maybe if you play the game you'll learn why. I doubt it. There wasn't much of an explanation before.
OK, enough vamping. You should have watched the clip by now. Listen, I saw Ocarina of Time in motion on the 3DS at GDC. Seriously, it's beautiful. You should definitely be excited about the game. It's still awesome, one of the best games ever, certainly the best from Nintendo. Can't wait for June!