I have Hikvision DS-2DE4A425IW-DE PTZ camera.
To avoid false alarms in the PTZ smart tracking, I’m using the camera Smart Event feature, intrusion detection. I drew the area to monitor and in the Linkage Method tab, I enabled Smart Tracking. The future works well.
I want to enable recording...
You can buy a device that can detect hidden cameras and wireless listening/transmitting audio. They are okay, but not as good the high-end professional models.