The keyword phrase "download video ig" functions as a verb phrase or an imperative clause. The main point and the operative part of speech is the verb "download," which signifies the primary action or user intent.
A grammatical analysis breaks the phrase into three components. "Download" is a transitive verb that requires a direct object. The direct object is the compound noun "video ig." Within this compound, "video" is a noun, specifying the type of media. "Ig," an abbreviation for the proper noun Instagram, acts as a noun adjunct (or attributive noun), modifying "video" to specify its source. The complete structure is Verb ("download") + Direct Object [Noun Adjunct ("ig") + Noun ("video")].
For the purpose of an article, identifying "download" as the core verb is critical. It establishes that the article's topic is procedural and instructional. The content must focus on providing the method, tool, or process to accomplish the action of downloading. The entire phrase represents a user's direct goal, making the verb the central concept that the article must resolve.