No Video Nest Battery Doorbell (2nd Gen)
Hi,
While I believe I followed the instructions, I seem to be having issues that I get no video from my Nest (battery) 2nd Gen doorbell. 
I seem to get a G icon and that's all. I've tried ringing the doorbell but nothing seems to happen.
It is also loading correctly in Homebridge without error. 

With that said upon further troubleshooting, when I follow the Google documents, upon accessing the API I get an error: 
{
  "error": {
    "code": 400,
    "message": "Command sdm.devices.commands.CameraLiveStream.GenerateRtspStream not supported.",
    "status": "INVALID_ARGUMENT"
  }
}

I'm assuming this is why I'm not getting any video? 
Any ideas?

Thanks
Michael