You'll soon be able to use Chromecast—Google's media player that streams content to TVs—even if you're not connected to WiFi.
Announced on Wednesday at Google I/O, the new feature will allow you to cast content to a friend's Chromecast via cloud, as opposed to via WiFi connection. Proximity-based authorization will ensure that this access has been mutually granted. In other words, you won't need to ask your friend for the home WiFi password to push content to the TV.
Chromecast drives the majority of YouTube TV views.