Youtube claiming copyright?

I began uploading a playthrough series of Fable - The Lost Chapters, and I did not add any music or anything to the series, and all that the videos are is just the gameplay and me talking in the background, Youtube gave me the "You have videos that may contain content that is owned by someone else." thing and it is referring to those videos, it says that they infringe on "Entity: Music Publishing Rights Collecting Society Content Type: Musical Composition", but this is music from a video game... I have never seen copyright infringement show up from videos of games before, I was wondering if this is in fact copyright infringement, and if not, how to remove it. Thanks.