Video Doorbell 2

Hello Ring Team, I’ve Video Doorbell 2. My question is, Why do I need internet to “view “ live camera while I’m on the same WiFi network ? I’m asking this because I’ve checked almost all topics all are based on the internet speed. The only factor I believe it matters is the RSSI (WiFi strength). for me it’s green result. So, do you upload all camera capture to somewhere (you server for example) and then we are downloading it although the app and the bell on the same WiFi network? Thanks