Question 1: What action
"Build awareness" is not an action. "Get the right viewer to book a discovery call" is. "Convert trade-show booth visitors into qualified leads in our sales CRM" is. The more concrete the action, the easier it is to know whether the video succeeded.
Question 2: Who exactly
Not "decision-makers in manufacturing." A real audience description sounds like: "VP of operations at a $50M to $200M precision-machining shop in the Midwest, currently outsourcing video work and not satisfied with the results." That level of specificity changes how the video is shot, which interviews matter, and what tone is right.
Question 3: One thing to remember
Pick one. If you list 5 things, the viewer remembers none. Brand films and corporate videos both work better with a single takeaway. The brief should name it explicitly: "After watching, the viewer should believe that we're the only firm in the Midwest that does X."
Question 4: Where it lives
Homepage hero, sales follow-up email, paid social, internal kickoff event, trade-show loop. The placement determines length, audio strategy (will it have sound?), and whether it needs captions or a voiceover. A homepage hero and a trade-show loop are different animals; a brief that doesn't specify ends up serving neither well.
What to leave out of the first draft
Skip the brand history, the founder bio, the company pillars, and the mood-board references. Those help during pre-production, but they slow down the brief. The 4 questions above are what move the brief forward. Everything else can be discussed in the kickoff call.