This is the 4418th most frequent Russian word.
видеонаблюдения
Video surveillance.
Here, 'видеонаблюдения' is used as a noun in the genitive case to describe the type of system being installed.
Установка системы видеонаблюдения позволит повысить безопасность.
Installing a video surveillance system will enhance security.
In this sentence, 'видеонаблюдения' serves as the subject in the plural form, emphasizing its role in security.
Видеонаблюдения являются важной частью современных систем безопасности.
Video surveillance is an important part of modern security systems.
Here, 'видеонаблюдения' is in the genitive singular case, specifying the type of recordings being checked.