I just found this on YouTube (posted on February 26, 2016), and it is mind-boggling that this is a fan film! The video can be found by searching for "star trek horizon full film"; it should be the first non-ad video listed. There's a great review of it on the "For the Love of Trek" website at startrekrenegades.com, if you're inclined to read up on it first. (There was a "minor spoiler alert" given, but i couldn't find any real spoilers.)
In the credits, the phrase "A film by Tommy Kraft" is way more accurate than how that phrasing is normally used (to mention the director of a film). He served as director, writer, producer, editor, director of photography, and costume designer, and also did the visual effects and music. It took him four years to complete the film, and the result is astonishing.
About the only point that I'd really fault it on, is that the actors aren't professionals, and it does sometimes show. But, as regards everything else...man, this kid is going places in movie-making. It looks so much like a movie, that it needs to be watched on a big-screen TV. To echo a sentiment in the above-mentioned review, this may be the greatest demo reel you'll ever see.
