It was good but...
When making a trailer for a movie in production. Your trailer has to do a few things. The first is to showcase your talent, and this definitly does that. Secondly a release date or some sort of approximated release. If people are interested they would like to know when they should seek out your finished product. If they have to keep coming back and searching for it and too much time has gone by they'll eventually just lose interest, but if you add a tag like "Coming this Winter" they won't be discouraged if there's nothing new in the next several months. Last and most importantly is give a quick plot summary, in other words, tell us what the story is about. We don't have any idea what your movie is about, we can tell there's violence, bloodshed, samurai, and a blindfolded man (the robes he was wearing made him look like a catholic priest).