i'm used to editing and making lil videos of runs picking a particular composition to fit certain stages mostly for fun, and was wondering if that's allowed for the leaderboards for this game so long as the game sounds are audio balanced with it and clearly audible

i also will often play stages without the in-game music and just the game sounds for focus, and in those situations it'd also be nice to be able to add music to the video

thank you

Absolutely! There is no emphasis on game music, just as long as the engine and background noises are on. Voices are also not needed.