The Google Home smart speaker can work seamlessly with one or more Chromecasts. Once you've set up both your speaker and your streaming device(s), the Google Home app can coordinate actions between the two. To play music, movies, or shows--no tapping or selecting required--simply say "OK Google" and tell your Home device to play whatever you want to see or hear on whatever you've named your Chromecast. For example, say "OK Google, play cat videos on the living room TV," or "OK Google, play classical music on the bedroom TV." (If you originally gave your Chromecast a confusing or unpronounceable name, this application gives you a good reason to change it--you can rename it in the Google Home app.) When Google Home follows your commands, it will by default play videos on YouTube and music on Google Play Music.