If this feature is browser-based then one could easily show YouTube videos (and music). I think a question is who all can see and hear it? If one has guests on the boat is the stream shared and sync'd? Clearly during a race it wouldn't broadcast to everyone racing but if an individual liked "racing music" I don't see an issue. Access to the volume settings would have to be easy with each person on the boat (possibly) having their own mute option.

I like the Idea of having the ability to listen to our own music

Maybe for casual sailing. While in a race i’d never use this. Although even for casual sailing i wouldn’t use it.