The keyword term is a noun phrase. The primary part of speech, representing the core subject, is the head noun "videos." The preceding words, "Patriots Day" and "film," function as noun adjuncts or attributive nouns, which act like adjectives to modify and specify the type of videos being referenced.
In this grammatical construction, each preceding noun narrows the scope of the noun that follows it. "Patriots Day," a proper noun, modifies "film" to specify which movie is the subject. The resulting compound modifier, "Patriots Day film," then modifies the head noun "videos." This hierarchical modification clarifies that the user is not searching for videos about the holiday itself, nor for the complete film, but for video clips, trailers, analyses, or related content derived from or about the specific cinematic production.
Understanding that the main point is the noun "videos" is crucial for content strategy. It dictates that the article's focus must be on providing, embedding, or discussing video content. The modifiers "Patriots Day" and "film" define the specific context. Therefore, the content should center on video materials such as official trailers, cast interviews, behind-the-scenes footage, or scene analyses related to the movie, rather than a general review of the film or a historical account of the holiday.