The delay is starting to bug me too. It's useless to try speaking through the doorbell audio because once it's triggered it takes 2-3 minutes before you can see anything. I can only guess it's too busy downloading the video to the server to be able to respond to the app.
About the only thing it's really good for is motion activation when you get a delivery (as they never ring the doorbell). So basically it's just to alert you that someone is at the door.
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