Garrett: Get a job assumed proventil online secure The Chromecast device is essentially an app-driven gadget that lets users watch content from any number of devices on their TV. Much like the Apple TV or Roku, it allows users to connect to streaming services such as YouTube and Netflix using their smartphone, tablet or laptop like a remote control to watch that content on their TV. Unlike Apple Airplay and Apple TV, however, Chromecast will work with all sorts of mobile devices, so even if you're a platform-divided family, everyone can play.