The keyword phrase "Patriots Day Blu-ray" functions as a compound noun. In this construction, the head or main noun is "Blu-ray," which identifies a specific physical media format. The term "Patriots Day" serves as a noun adjunct (or adjectival noun), modifying "Blu-ray" by specifying the content of the disc.
Grammatically, the phrase consists of two distinct nouns working together to name a single, specific entity. "Patriots Day" is a proper noun, the title of a film. When placed before "Blu-ray," it loses its primary function as a subject or object and instead takes on a descriptive role, answering the question "Which Blu-ray?" The primary part of speech for the entire term is therefore a noun, as it refers to a particular object.
Understanding this classification is crucial because it defines the subject of the article as a tangible product. The focus is not on the film's narrative or historical event in the abstract, but on the specific commercial item that contains the film. Consequently, content should be oriented around product details, such as special features, technical specifications (video/audio quality), release date, and purchasing information, as these aspects directly relate to the compound noun's meaning.
