Help articles say I need a Chromecast to link to YouTube, but is there a way I can just cast from the Best Audio to the existing TV app the same way that I do on my phone?
If your TV has Chromecast built-in then you can use a voice command on your Nest hub to play content on your TV. If it doesn't have Chromecast built-in then you will need a Chromecast device plugged in to one of the HDMI ports.
So no, there isn't a non-chromecast method to make the Nest communicate with the YouTube app like other Google devices can. A walled garden is what I wanted to avoid yet I fid myself in one anyway.
@Cathal_S, thansk for the help.
@RockLoi, thanks for posting. I hope you've got the answer you're looking for. We're always looking for ways to improve. I'd suggest you submit feedback about it, here's how.
Let us know if you have other questions and concerns otherwise, we will be locking this thread after 24 hours.
Google Nest Help Center
Chromecast Help Center