All video streams as well as any video device commands are sent from Alarm.com servers over a VPN connection using bank-grade AES-256 encryption.

This means that even if there is no security on the local Wi-Fi network (or your Wi-Fi security is somehow compromised), video devices will always connect over a high security path, using either the VPN (for relayed connections) or through HTTPS (for direct connections).

The account owner can see all cameras associated with the account, and additional logins created for the account can be assigned permission to see the cameras as required.