Very good Question Irvine . On Cemetery gates I used HD movie Make Pro its about 10$ app made by Microsoft. You can get it from the AppStore .They update it a lot but I don't notice anything useful being added to it. Afterlife A Transition I used Openshot video editor . Its a free Download and remarkably over powered and unlike some video editors its easy to use , not too much of a learning curve. As for the music YouTube offers a free music download list . I had time one day and downloaded about 50 tunes and I usually pick from that pool , which ever suits the video the best.
What editor do you use ?