Before installation, check what permissions the app requests. A legitimate camera viewer should ask for:
Unofficial APK sites are a top source for spyware, adware, and keyloggers. A camera app with malware could potentially access your phone’s actual camera and microphone without permission. Usb Camera Viewer Pro Apk
YouTubers use their older Android devices as secondary monitors for their DSLR or mirrorless cameras. By running Usb Camera Viewer Pro, they can check framing and focus without walking back and forth to the camera rig. Before installation, check what permissions the app requests