When you first open the map you may not see anybody live streaming and this is because there are no users logged in. Drag the map around using your mouse and zoom in using your mouse scroll wheel to see markers around the world

Green and Red Round shaped Flashing markers are mobile live streaming units whereas non flashing markers are fixed information markers

Click on any RED flashing markers to see the live stream. A GREEN marker means the user is only sending their position and not live streaming. A GREY round flashing marker means this is the last known position