the main concern here would be the streaming service. If the streaming service offers a full API for custom implementations, then you're probably fine. If, ins

the main concern here would be the streaming service. If the streaming service offers a full API for custom implementations, then you're probably fine. If, instead, you're using their non-public API, you'll probably get a Cease And Desist and your API keys revoked. Then, like the other response mentioned, there's the streaming aspect. You, probably won't get sued, but anyone that streams with that music will get muted on Twitch and Revenue Claimed on YT. Why build a minecraft mod for this, when you can just play music on your computer and turn off the minecraft music? A few hotkeys and you don't even have to swap screens to change the music.