Updated "Slayer but Halo Audio" Background Video to have a higher volume. Adjust your main menu music to be 1-20. As you turn the music higher the MCC Menu music will overtake and distract from the video background's audio.

There is a base version and an Audio version. The audio version just has the epic arcane music by Samuel Kim, and you should only use it if your menu volume music is very low (<10) so you don't hear the menu music clashing with the video's music.