I have no idea how I stumbled across this on Youtube, but holy crap... Here's an explanation as to how the creator got the original casts' voices: http://www.axanarproductions.com/fan-film-friday-star-trek-beyond-antares-part-1/
I'm really impressed by the audio work (as a prof of concept, not a finished product) but that animation... (although the overbearing music is a big issue) Ooof. I've long been fascinated by the idea that as CGI get's better and better, the time will come when you can create new episodes of old programs by manipulating old audio to go with new images. But this is very much a prototype in it's crudest form.
It's already started. I mean, look what they did in Rogue One, and that was slightly crude. It will get better very quickly.