AI B-Roll Workflow: Pick Moments From the Script, Direct a Frame, Animate in Runway
Matt Paige shows how he makes B-roll for short videos: ChatGPT picks the three or four script lines that need a visual, he builds and fixes a reference frame, then animates it with Runway inside ChatGPT. The tutorial gives his prompts for each step and includes a Runway discount code.
Key points
- Start from a finished script and ask for only 3-4 B-roll moments, each with the exact line, its purpose and a length
- Attach a reference image whose style you like instead of relying on words like 'cinematic'
- Ask for four clearly different directions for each shot, including surreal ones
- Fix the still one or two changes at a time before animating; flaws get worse in motion
- Keep the motion prompt to one main action and a simple camera move
- If a shot looks like stock footage, rethink the idea rather than generating more