Google Nest Community

I have 3 indoor cameras at the moment. Can I set these cameras in a 'patrol mode' so that it scans from one camera to the next when viewing on a phone or Google hub?

I currently have 3 indoor cameras set up in children's rooms. I can get a split screen on my phone and see all three cameras at once but have no sound/audio. If I select one camera only, I can hear sounds. Any suggestions on how to get sound for all ...