Here is a video detailing one transmedial aspect of the Hunger Games franchise: “The Hanging Tree” song.
The text for the song was written by Suzanne Collins in Mockingjay, the third and final book in the series, and, before the film came out several fans wrote music for and recorded their own version of the song.
Fan music:
tyrannosauruslexxx: https://www.youtube.com/watch?v=At3XDMUCZ-8
Sam Cushion and Rachel Macwhirter: https://www.youtube.com/watch?v=N96ZLalhvmI
Adriana Figueroa: https://www.youtube.com/watch?v=uKrCE1aYz7o