I was wondering if it is possible to have an interface similar to Vivint's Sky Panel/Doorbell Camera using a GC3 and some existing Doorbell Camera (no preference). I know it is possible to integrate them by having an alarm.com subscription, but I am not looking to have a subscription for home security at the moment. Idealy, I would like it to be a DIY. Is there a possible solution for this?

Thank you for your input!