I don't think that's how Chromecast always works (though it can work that way). Most of the time, your device(s) tell the Chromecast what to play, and the Chro

I don't think that's how Chromecast always works (though it can work that way). Most of the time, your device(s) tell the Chromecast what to play, and the Chromecast plays that on its own. There is integration which tries to sync the UI on the "controlling" device to the playback of the Chromecast but this fails often enough for me that it's clear that (in my case) my phone isn't streaming to the Chromecast directly unless I'm screen mirroring.