Periscope is a live streaming tool that is owned by Twitter and one can thereby access lots of information about other people on twitter who you follow and also you can invite into the video streams. The channel also has a function letting your Twitter followers know that you’re live streaming. Unlike Blab and the media channel Meerkat, presented below, you can also create private streams for a few selected followers to watch.

Try it out: https://www.periscope.tv/