To use this camera without an internet connection, it can record locally on a microSD card. However, you'll need a Wi-Fi connection to set up the camera via the Xiaomi Home app. Once configured, it can continue to record locally even without internet, but you won't be able to access the recordings remotely.

To get around the need for an internet connection for installation, there is no official procedure provided by Xiaomi to avoid this step. I advise you to consult the official forums or the Xiaomi community for specific tips.