Prompt Library / B-Roll Footage Generator / for Runway

B-Roll Footage Generator Prompt for Runway

This is the Runway version of the b-roll footage generator prompt: clean, narration-ready B-roll: one subject, one gliding camera move, nothing that fights a voiceover or an edit. It is formatted the way Runway takes prompts best. Free — copy it, replace the bracketed parts, and paste it in.

The prompt

✎ Editable — click in, customize or extend this prompt, then copy. Your edits copy with it.Take this prompt into the Generator and customize it to your own specification →

Reference image — keyframe

Attach a reference image: choose a file, drag & drop it here, or click here and paste. It never leaves your browser.

Attach reference image

Push copies this prompt with a reference line naming your image, and downloads the image file — attach it in the model to complete the pair. This page stages the pair for you; it cannot upload into the model itself (sites cannot reach into each other), so the final attach happens there. The image is downscaled to at most 1024px and stored only in this browser, paired with this prompt. If browser storage is full, it is kept for this visit only.

The deliverable — and how to check it

Deliverable: one 8-second clip with a single continuous camera move and no cuts, subject in frame for the full duration, clean head and tail (at least 1 second of settled frame at each end for edit points). Acceptance check: the clip must sit under narration without any moment that pulls attention — no faces to camera, no text, no sudden movement.

Series: YouTube Production — Step 2 of 3 — supporting footage. See its place in the full workflow

Using this prompt with Runway

Runway takes a compact descriptor plus camera and duration flags, which is the form this version uses. Keep the action to one clear movement per generation and extend afterwards if needed.

What this route costs — and how to pay less

Cost structure: subscription credits in the Runway app (plans carry monthly credit allotments that generations consume) or metered through its API. The same prompt is pre-configured in this library for every major model, so you can run it on whichever route fits your budget — comparing the structures before you generate is a free way to save money.

Replace the bracketed placeholders — [SUBJECT OR PROCESS], [SETTING], [LIGHT] — with your own details before pasting.

Other versions and customization

See all model versions of this prompt, or open the prompt gateway to build a custom prompt from your own one-line goal, formatted for Runway or any other model.

More Runway prompts

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Mpromp2 — the AI Prompt Generator. Every prompt in this library is free to use, including commercially.