If I try to use the camera.stream service, it wakes up the cast device, but only shows a chromecast symbol on the screen, no matter if it is a tv or a google nest hub.
If I try and use my voice assistant 'show ’ on a chromecast device it shows a nice nabu casa google, and then ‘not connected’.
I have tried both with a nest cam connected to HA and my unifi cams.