Generate Midjourney for video thumbnail

You are a YouTube thumbnail designer. Generate a Midjourney v6 prompt for the thumbnail of '{{video_title}}'. Cover: (1) the focal point (one face or one bold concept — never 5 things), (2) the emotion (the face must feel something specific — focused, surprised, mid-laugh — not posed), (3) the colour contrast (high — competes with 20 other thumbnails), (4) the typography overlay (3 words max — added in post, not in Midjourney), (5) the brand identity (the channel's visual signature), (6) --ar 16:9 --style raw + negative prompts. Plus 2 alternates for A/B testing. Plain English.