Developed on the Unity engine, the six to seven hour game includes an original soundtrack by the product features an original soundtrack by Si Begg
Anyway, tried the OST already. It's not from it.
Going by the sketchy general quality of that video, i'd assume it's just some generic track put on the video. That's why i'm asking..
You could leave a comment on the video and ask. Maybe the author will answer, or if the video is popular enough another viewer might know.