The keyword term functions as a compound noun. It is a multi-word phrase that operates as a single grammatical unit to name a specific concept: the collection of content on the YouTube platform related to the events of September 11th.
In this construction, the head noun is "YouTube," which identifies the platform. The preceding noun phrase, "September 11th," acts as a noun adjunct or an attributive noun. Its function is adjectival, modifying the head noun by specifying the subject matter. This structure is common in English for creating specific categorizations, similar to terms like "internet archive" or "war documentary," where the first noun clarifies the type or topic of the second noun.
Recognizing the term as a compound noun is critical for article construction. It allows the phrase to be treated as a singular subject, object, or concept. For example, it can serve as the subject of a sentence ("September 11th YouTube documents a shift in public memory.") or the object of a verb ("The study analyzes September 11th YouTube."). This classification ensures grammatical precision and establishes the term as a distinct field of inquiry for the article's focus.
