Question about Ubiquiti UniFi Video G3-Flex

How can this camera be accessed autonomously via the web interface? Now I have bought the recommended switch and am asked via the web for a password and user name for the cam. However, I only receive these in the account of a Unifi NVR.

Of course, the G3-Flex can also be operated without other Ubiquiti products, but at least one POE switch or POE power supply is required.