This is a Stranger Things Theme with Childish Gambino Bonfire mixed over it, mixed by kmlkmljkl.
This was made by him, I'm only re-uploading to add this to my playlist (full version). This isn't monetised and all credit goes to him.
Sub to kmlkmljkl here: https://www.youtube.com/user/kmlkmljkl
Follow him on Twitter: https://twitter.com/kmlkmljkl
His Soundcloud is here, with the full version in HQ: https://soundcloud.com/kmlkmljkl