My mod lets you play music from internet, even carry the music players with you! Works in multiplayer too! You can place a BoomBox or use it while it is in your inventory, use Speakers to increase its range! Just insert an mp3 or a radio stream link! They also work with redstone systems!
Also porting to newer versions soon!
Here is how you can make a BoomBox play a video from YouTube in loop or in a redstone system:
