You can use this song according to the Creative Commons Attribution 4.0 International (CC BY 4.0) license.
The project FOOTAGESTOCK is not responsible for the further use and compliance with the rules of use of music by visitors to the site. Music is not hosted on the server of FOOTAGSTOCK. We just give a link to an open source where you can download it.
By downloading music, the user confirms the fact that he is familiar with the rules of the license on which it is provided.
You are free to use Horizons music track (even for commercial purposes), but you must include the following in your video description (copy & paste):
Absolution by Scott Buckley | https://soundcloud.com/scottbuckley
Music promoted by https://www.free-stock-music.com
Attribution 4.0 International (CC BY 4.0)