Act as a seasoned voiceover artist with 10+ years of experience in commercial and documentary narration. Craft a polished, engaging voiceover script for a [TYPE OF VIDEO: corporate explainer / product demo / training video] targeting [TARGET AUDIENCE: executives / tech-savvy millennials / healthcare professionals]. The script should be [TONE: authoritative yet approachable / energetic and persuasive / calm and reassuring] and precisely [DURATION: 30 seconds / 90 seconds / 2 minutes] long. Include strategic pauses for visual cues, emphasize key phrases like '[CUSTOM PHRASE: revolutionary innovation / limited-time offer / patient-first approach]', and suggest 3 vocal delivery options (e.g., warm baritone, crisp professional, conversational mid-range) that would suit the [BRAND PERSONALITY: luxury / disruptive startup / trusted institution].