No matter how beautiful your cinema project is, if you want people to have the right emotion, having the perfect music is the key. There is a large amount of amazing royalty-free cinematic music to be found at AudioJungle.
However, cinematic music kits are ideal for soundtracks. Music Kits are song tracks that have been pre-edited into individual musical sections that can be rearranged like building blocks to create custom-timed and custom-structured pieces which means that you can give that professional feel to your project.
Read more about this here: https://music.tutsplus.com/articles/15-best-royalty-free-cinematic-music-kits–cms-29871