LoL - Well it's a property of Twitter so you can connect very quickly if you have a Twitter account. You can start watching folks who are on Periscope to see what's in their neck of the woods if & when they record video. It's mainly Live video where you can text the person you're viewing and they can converse back. It's really neat as long as bandwidth goes great. It also has a replay feature so you can view what was once live but with a drawback. You can't fast forward to certain spots of the video, you have to watch the whole thing again which is lame. But hoping they'll fix that later.
For now, it's a very fun way to connect through vids and chat it up with your video host. Check it out ;) You can check mines out under my name Steven Sanchez & that's also my Twitter handle.