Complex sentence: The term "security camera" is commonly used to provide a justification for a surreptitious recording, and can be contrasted with CCTV, which is visible and which sometimes is accompanied with a warning notice of its presence.
Split into simpler sentences: The term "security camera" is commonly used to provide a justification for a surreptitious recording. A security camera can be contrasted with CCTV, which is visible and which sometimes is accompanied with a warning notice of its presence.