The app can accommodate up to six people, all of whom will have the power to pause and change what the group is watching. You'll even have a ton of videos to choose from, since it comes with YouTube integration at launch. Cabana pulls your friends' details from both Tumblr and your contacts list, so you can invite anybody you want...unless they're outside the US. The app is only available in the country for now and only for iOS devices. The social network didn't say if and when it'll be available in other locations, but it'll at least release an app for Android devices in May.