Chromecast is a device that receives a URL from my phone, loads that URL content, and plays the video. Why does it need to depend on Google Cloud at all? Sure,

Chromecast is a device that receives a URL from my phone, loads that URL content, and plays the video. Why does it need to depend on Google Cloud at all? Sure, Google connectivity can enhance it, but you don't need Cloud to make a device like this useful. Same thing with the Title routers, where your local network collapses if the Cloud has a problem.