That's one of the apps I use most about dolphin and I'm really happy to find it on Una. plus the ability to stream to unauthenticated members, so it's possible to get a message out to members who are signing up, that's great.
It has as limit only the imagination, I use it to remind to the standard member that it is important to support us by passing premium member, I use it at the new year by diffusing a video with lights of fireworks, to say to people who have just registered to wait while we validate the profile, in fact I do not stop using it.
Very very very useful, I recommend!