# AI B-Roll Generator > B-roll is the supporting footage you cut to over your main shot (the A-roll): a coffee pour, a city skyline, hands typing — shots that show what the speaker is talking about and hide jump cuts. An AI b-roll generator makes those cutaways from a text prompt instead of a stock library or a shoot. On Kenerate AI, Wan 3.0 makes a silent 5-second b-roll clip at 720p for 150 credits, 2–30 seconds long, in 16:9, 9:16 or 1:1; the Video Studio needs a paid plan. URL: https://kenerateai.com/ai-b-roll-generator Publisher: Kenerate AI (https://kenerateai.com) Last updated: 12 November 2026 ## Key facts - Default model: Wan 3.0 (Alibaba), picked for silent b-roll - Clip length: 2–30 s per clip - Resolution: 480p · 720p · 1080p, 4K with the video upscaler - Sound: Off or on, same price on Wan 3.0 - Ratios: 16:9 · 9:16 · 1:1 · 4:3 · 3:4 - From your own image: Image to video from a product photo or a frame - Watermark: None - Plan: Video Studio needs a paid plan - Wan 3.0 (Alibaba): Text, image or 10 refs → 2–30 s · up to 1080p · sound on or off. Everyday silent b-roll, vertical or wide. - Seedance 2.5 (ByteDance): Text, image or 30 refs → 4–30 s · up to 4K · sound. Cinematic hero cutaways in 4K. - Veo 3.1 (Google DeepMind): Text, image or 3 refs → 4/6/8 s · up to 4K · sound. Shots with matching ambience. - Kling v3 Pro (Kuaishou): Text or image → 3–15 s · sound. People and expressive motion. - LTX 2.3 (Lightricks): Text or image → 5–20 s · up to 1080p. Cheap drafts to test an idea. ## Steps 1. Mark the gaps in your edit — Go through your A-roll and note every line that needs a picture, every jump cut to hide and every long talking stretch. Each gap becomes one b-roll shot. 2. Describe one shot per prompt — Subject, action, one camera move, light and lens: "close-up of hands typing on a laptop by a window, soft daylight, slow sideways slide". One idea per clip cuts better than a busy scene. 3. Pick the frame and length — 16:9 for YouTube and websites, 9:16 for Shorts, Reels and TikTok. Most cutaways are 2–5 seconds on screen, so generate 5 s and trim. Turn sound off unless you want the model's ambience. 4. Generate, then keep or retry — Watch the clip once at full size. Keep it, or change one thing in the prompt and run it again — our coffee and turntable shots needed a second look. 5. Cut it into your timeline — Download the MP4 and lay it over the A-roll audio in your editor, or join clips with a voice-over and music in Kenerate Agent's montage. Upscale keepers to 4K if your edit is 4K. ## In depth ### AI b-roll, stock footage or a shoot? Three ways to fill a cutaway. AI wins when the shot is generic but specific to your script; real footage wins when it has to be a real place, person or product. Compared on 12 November 2026. Stock licences and prices vary by library; check each library's terms. - You get: AI b-roll on Kenerate — The shot you describe, in your frame; Stock footage library — The closest clip someone already filmed; Shoot it yourself — Exactly your subject, real - Time per shot: AI b-roll on Kenerate — A few minutes to generate; Stock footage library — Minutes to hours of searching; Shoot it yourself — Hours to days - Vertical 9:16: AI b-roll on Kenerate — Generated in 9:16; Stock footage library — Often cropped from 16:9; Shoot it yourself — If you film it that way - Real places and people: AI b-roll on Kenerate — Not real — label realistic scenes; Stock footage library — Real, licence decides use; Shoot it yourself — Real, with releases - Your own product: AI b-roll on Kenerate — From your photo (image to video); Stock footage library — Not available; Shoot it yourself — Yes - Consistency across shots: AI b-roll on Kenerate — Hard; reuse a start image; Stock footage library — Hard across different clips; Shoot it yourself — Easy - Watermark: AI b-roll on Kenerate — None; Stock footage library — Until licensed; Shoot it yourself — None ### B-roll in one minute Film and video editors split footage into A-roll — the main shot that carries the story, usually someone talking — and b-roll, the supporting shots cut in over it. B-roll shows what the speaker describes, covers jump cuts and mistakes in the talking track, and changes the picture often enough to keep viewers watching. Classic b-roll is generic on purpose: an establishing shot of a city, a close-up of hands, a product on a table, nature moving in the background. That's exactly the kind of shot a video model can make from a sentence. ### Our test: six b-roll shots on Kenerate We generated the six shots in the gallery on 12 November 2026 — 16:9, 5 seconds, text only, unedited. What happened: - Worked first time (Wan 3.0, 150 credits each at 720p): hands typing on a laptop, the coastline aerial and the café scene — though the coffee only drips from the carafe and never reaches the cup. - Needed a second run: the city time-lapse on LTX 2.3 (60 credits at 1080p) was almost static with an invented sign on a tower; the Wan 3.0 retry gave a good dusk skyline with drifting clouds, but still no day-to-night change. The turntable on Seedance 1 Pro Fast (72 credits) didn't rotate and gained a made-up label; the Wan 3.0 retry kept the bottle blank. - Kept with a caveat: the LTX 2.3 leaves came out darker and stiller than the prompt asked — usable as a moody cutaway, not as a sunny one. - Total for the page: 942 credits for the clips, including 132 credits of drafts we didn't use. ### When AI b-roll is the wrong tool Generated footage is invented. Use real footage when: - The shot has to be a specific real place, person, event or product someone will recognise. - You need the same subject across many shots — models drift between clips unless you start each one from the same image. - The b-roll is evidence (news, reviews, before-and-after): realistic AI scenes that didn't happen need YouTube's synthetic-content label and can mislead viewers. ### Writing b-roll prompts that cut well One subject, one action, one camera move. Name the light ("soft morning window light", "golden hour") and the lens ("close-up", "wide establishing shot", "shallow depth of field"). Add "no text, no logos" for anything with surfaces a model might write on. Match your A-roll: if you film warm and handheld, ask for warm light and a gentle handheld drift, so the cutaways don't look like they came from another video. References: [1] YouTube Help — Disclosing altered or synthetic content: https://support.google.com/youtube/answer/14328491 ## FAQ Q: What is b-roll? A: B-roll is supporting footage that plays over or between your main footage (the A-roll). In a YouTube video the A-roll is you talking to camera; the b-roll is the cutaways — the product, the place, hands at work — that show what you're describing, keep the pace up and hide cuts in the talking track. Q: What is an AI b-roll generator? A: A tool that makes b-roll clips from a text prompt (or from a photo) instead of searching a stock library or filming. On Kenerate you describe one shot, pick the model, length and frame, and get an MP4 to drop into your editor. Q: Which model should I use for AI b-roll? A: Wan 3.0 for everyday silent b-roll: 2–30 s, up to 1080p, wide or vertical. Seedance 2.5 or Veo 3.1 when you need 4K or the model's own ambient sound, Kling v3 Pro for people in motion, and LTX 2.3 only for cheap drafts — two of our LTX and Seedance 1 Pro Fast drafts weren't usable. Q: How much does AI b-roll cost? A: On Wan 3.0 a 5-second clip costs 75 credits at 480p, 150 at 720p and 300 at 1080p, with or without sound. LTX 2.3 is 60 credits for 5 s at 1080p but missed our prompts more often. The six clips on this page plus two failed drafts used 942 credits. One-time packs start at $15 for 1,300 credits. Q: Is there a free AI b-roll generator? A: Not for video on Kenerate: the Video Studio needs a paid plan, and the 25 credits a new account gets are not enough for a clip. There's no watermark on paid clips. Q: Can I use AI b-roll on YouTube? A: Yes. YouTube asks creators to disclose realistic altered or synthetic content — its examples include a realistic scene that didn't happen and AI-generated extra footage of a real place. Generic or clearly non-realistic cutaways, and AI used for scripts or outlines, don't need the label. When in doubt, tick the disclosure box in YouTube Studio. Q: How long should a b-roll clip be? A: Most cutaways are on screen for 2–5 seconds. Generate 5 s and trim, or 8–10 s for a slow establishing shot. Wan 3.0 goes up to 30 s per clip if you need one long take. Q: Can I make vertical b-roll for Shorts, Reels and TikTok? A: Yes — pick 9:16 before you generate, so the shot is composed for a phone screen instead of cropped from a wide clip. Q: Can I make b-roll of my own product? A: Yes. Upload a clean product photo and use image to video, describing only the motion ("slow turntable spin, soft studio light"). The model keeps your product's look instead of inventing one — when we described a bottle in words, a cheap model invented a brand name on it. Q: Does AI b-roll have sound? A: Only if you want it. Wan 3.0 has a sound switch at the same price; Veo 3.1, Seedance 2.5 and Kling generate ambience too. For b-roll under a voice-over, silent clips plus your own music usually mix better. ## Related pages - AI video generator: https://kenerateai.com/ai-video-generator - Wan 3.0: https://kenerateai.com/wan-3-0 - Text to video AI: https://kenerateai.com/text-to-video-ai - AI video upscaler: https://kenerateai.com/ai-video-upscaler - AI video extender: https://kenerateai.com/ai-video-extender - AI product video generator: https://kenerateai.com/ai-product-video-generator - AI explainer video generator: https://kenerateai.com/ai-explainer-video-generator - AI commercial generator: https://kenerateai.com/ai-commercial-generator - AI voice over: https://kenerateai.com/ai-voice-over - Auto subtitle generator: https://kenerateai.com/auto-subtitle-generator ## Sources - Kenerate Video Studio: https://kenerateai.com/app/video - YouTube Help — Disclosing altered or synthetic content: https://support.google.com/youtube/answer/14328491 - Kenerate AI terms of service: https://kenerateai.com/terms