If you have a computer connected to a large screen, or wish to be able to record what's happening on your screen, there's a great app called Reflector 2 - see http://www.airsquirrels.com/reflector/features/win/
For me I find at handy for streaming Spotify through the house direct from my phone. (No premium required.) Also good for watching youtube videos etc.
It's not free but has a trial.