Chrome/Opera: Watching Netflix or YouTube clips online with other people usually involves counting down and hitting play together. Rabbit gets around this by allowing everyone to watch the same feed together. The service supports Netflix, YouTube, iView or anything that runs in the browser.
At its core, Rabbit is a group chat service with voice and video support. In that respect, it's not much different than Google Hangouts.
Where it distinguishes itself, however, is by allowing you to launch a window where you and your other guests can watch things like Netflix together. As you'll quickly notice, what you're really watching is a small virtualised Chrome instance, so anything that can be played in a browser can be shared with your friends. It even has Adblock Plus pre-installed.