Working from google home end to the cameras... The process for me is this. Tell Google home hub (or any google home) to open a camera. Ifttt is triggered (I setup google assistant as a trigger aka "this" in ifttt) which then sends a webhook. I have autoremote and tasker installed on my Android box (full android rather than Android TV, but this should work on Android TV which your shields are but I've stayed away from android TV for automation as it's not proper android). Autoremote gets the webhook (webhook is setup to send the message to the address autoremote has for me on the box) which then triggers a task in tasker. Tasker then uses autocast plugin to initiate the streaming between the Google home hub and the blue iris server. Works well and has plenty of flexibility plus utilises existing cameras and far more economical... But if this sounds daunting as you may not have used ifttt, tasker, autoremote and autocast) then yes the ones that work with Google home hub directly might be a better choice for you.