I'm gonna wait for Steam version
Free work is ok if it's not-commercical project, such as modding for game. If it's commercical and they're going to make money off your work then it's unfair.
Kingsglaive: Final Fantasy XV Teaser Trailer
This is a teaser trailer for the Kingsglaive: Final Fantasy XV CGI animated movie. It will follow the events of 2016 role-playing video game Final Fantasy XV. In Japan Kingslaive will be released by Aniplex on July 9 2016.
© Sony Pictures Entertainment, 2016 YouTube Link