i keep seeing it all over my dash and after ten seconds of research i have discovered:

This is not a fake trailer, but it isn’t a Nintendo trailer either. 

This is a fanmade video proposing Nintendo should remake Majora’s Mask. 

Created by Pablo Belmonte (psyco3ler) and Paco Martinez (Odewill) (http://browse.deviantart.com/?qh=&section=&q=odewill#/d3f8a09)
we are creating this small test for the “big N” as a proposal for make this project true.
We work in the game industry and we are in love with this idea long time ago.
The music are totally provisional. We worked for long time in concepts and designs, but for the real production we expend only one (hard) week, thats the reason of some “bugs” in animations and postproduction that we want to fix soon.

We hope that you enjoy and help us with your support.