So, I found some videos I loved on Vimeo and contacted their rightful owners. This took a couple of months (most people did not get back to me), but eventually I had three videos I was allowed to use, for free, provided I gave the proper credit to whomever had filmed. This deal makes sense since, for whomever had made the films, it meant free exposure :)
It also meant that, once the trailer was out, these people would likely share it through their own channels, helping to spread the word. It was a win-win!
If I were to redo a trailer now I would hire actors that look the part: Nico would be dark and mysterious, Leda a bookish tomboy, both would be older, etc…
Who am I to give you advice?
I am a very proactive author on a mission to change the world, helping writers getting published and discovered by readers. Part ninja, part unicorn, and part otaku, I am also a professor of biology and the very short author of the Italian Saga (#TIS), an irreverent series speaking about everything that matters and people don't talk about (for some reason) like sex, death, depression, gender identity, feminism, religion, and stereotypes.