AI B-roll generators

What B-roll does in an ad

B-roll is the footage that plays over or between your main shot. In a UGC ad the main shot, called A-roll, is the person talking to camera. The B-roll is everything you cut to while they talk, such as the product on a shelf or a hand opening the box.

It does two jobs. It covers the jump cuts between takes, so a 40-second script plays as one continuous take. And it changes the picture every few seconds, which gives a scrolling viewer a reason to keep watching.

MakeUGC’s B-roll page lists the shots ad makers ask for: “Product close-ups”, “Lifestyle scenes”, “Problem shots” and “Hook openers”. It also gives the length rule most editors follow: “Short clips work best as cutaways.”

Script-matched or prompt-only

The split that matters to you is who decides where each clip goes. A script-matched tool reads your lines and places the footage. A prompt-only tool makes one shot from a sentence you write, and you place it in your editor.

Vidpros compares AI B-roll generators of 2025Vidpros

MakeUGC: B-roll placed between your actor’s lines

MakeUGC generates B-roll from a short description, with an optional product photo. Its B-roll page says to “add a product photo so it shows up in the shot”. The format step shows Seedance 2.5 as the model, with 9:16 for TikTok and Reels or 16:9 for YouTube.

The part that saves editing time is placement. You can “drop clips onto the timeline in the editor”, or turn on auto B-roll and let MakeUGC “place them between your actor’s lines”. The page does not describe how it picks which line gets which clip.

Starter, $59 a month, exports at 480p and 720p, and HD to 4K starts on Growth, $79 a month (pricing page). Neither page gives a credit cost for a B-roll clip. The plans in full: MakeUGC pricing; every MakeUGC feature: MakeUGC hub.

In MakeUGC’s actor clips, users report lip sync that drifts and hands that move oddly. Each ad needs a check before launch (5 of 29 sources: YouTube, YouTube). Billing is the bigger complaint: charges after cancelling (17 of 29: Trustpilot, Trustpilot).

Best for

Direct-response teams testing many UGC and B-roll variants, with Batch Mode and product-in-hand video on every plan and API access drawing on the same credits.

Skip it if

you need 1080p cutaways on the entry plan: Starter exports at 480p and 720p, and HD starts on Growth.

invideo AI: a whole cut from one script

Paste a script into invideo AI and its agent builds the video around it, with a voiceover and captions. The B-roll comes from two places. Stock footage comes with the plan: the pricing page lists “100 Premium stock footage” on Starter, $20 a month. Generated Seedance clips cost credits, at $0.30 per second of video on Starter.

Users say much of the “AI video” is stock assembled by AI, with generated clips costing extra (6 of 42 sources: YouTube, YouTube). Others praise how fast a script becomes a finished short (7 of 42: App Store, Trustpilot).

The terms (8 July 2026, 4(h)) let you “commercialise Outputs you generate”. Stock clips follow their own licence.

Best for

Marketers who want a finished, edited video with stock, voice and generated shots in one tool, plus terms that rule out training on their data.

Skip it if

your cutaways must show your own product: stock footage cannot, so every such shot is a paid generation.

Kling: 3 to 15-second product shots

Kling’s 3.0 model makes clips of “3 to 15 seconds” at 1080p or 720p (Kling 3.0 guide). It takes a prompt, an image or several reference images. Feed it a product photo and you get a moving product shot. Native audio comes in the same pass.

How to Generate B-Roll with Kling AI (AI Video Tutorial)How To Tutor

Users report characters that hold across shots (4 of 37 sources: Reddit, YouTube). They also report failed and rerolled takes that still cost credits (10 of 37: Reddit, Reddit).

Rights depend on membership. The paid terms (10 October 2026) leave members’ commercial use “not restricted” (3.1.2). Under 7.2, a non-member must “label all content generated” with Kling’s brand and logo. Kling against Veo: Google Veo vs Kling.

Best for

Paying members making 3 to 15-second product clips with native audio who spend each month’s credits before they expire.

Skip it if

you plan to run ads on top-up credits alone: paid terms 7.2 make non-members brand every clip.

Google Veo: 8-second hero shots, indemnified on Google Cloud

Google Veo 3.1 makes clips of 4, 6 or 8 seconds in Flow, Google’s video app (Flow credits help). Flow lists 50 credits a day with or without a subscription, and Google does not state that a free account runs Veo 3.1.

A Veo 3.1 Fast clip costs $0.40 per video on Google AI Pro, $19.99 a month. On the Gemini API, Veo 3.1 Lite starts at $0.05 a second (API pricing).

Users single out cinematic hero shots and product scenes (5 of 62 sources: Reddit, Reddit). The most common complaint is weak prompt adherence, so a usable clip takes several paid retries (13 of 62: Reddit, Reddit).

Ad rights depend on where you run it. Veo called through Google Cloud is on the indemnified services list, so Google covers IP claims on unmodified output from paid use.

For Flow and the Gemini API, Google’s Terms of Service (30 July 2026) say “Google won’t claim ownership over that content” and neither grant nor bar ad use. Prompts that work: Veo prompts for ads.

Best for

Hero shots and B-roll up to 8 s with native audio, on a Google AI plan’s Flow credits or the Gemini API.

Skip it if

one cutaway must run past 8 seconds: Flow’s Veo 3.1 clips stop there.

Runway: B-roll from footage you already have

Runway suits the editor with raw clips. Its Aleph 2.0 model is an “in-context video editing model” (Runway models page). Users say Aleph 2.0 relights an uploaded clip or swaps its background or product. They put the limit at 30 seconds (4 of 54 sources: Reddit, YouTube).

Runway Gen 4.5 - Tutorial & How to Use in 5 MINUTES! [ 2026 ]Skills Factory

Standard, $15 a month, buys 52 seconds of Gen-4.5 a month and 4K upscaling (pricing page). Gen-4.5 works out at $0.29 per second of video.

Users report briefs and products that drift: logos change and products distort (13 of 54 sources: Trustpilot, Trustpilot). The top complaint is credits running out within one or two videos (22 of 54: App Store, Trustpilot).

The terms (15 September 2026, 4.4) set no limit on commercial use and grant Runway a training licence over your inputs and outputs. Head to head: Kling vs Runway.

Best for

Teams that want Runway’s own models and Aleph video-to-video editing next to Kling and Seedance, with no commercial restriction on outputs.

Skip it if

your brand cannot let ad footage train a vendor’s models: terms 4.4 grant Runway that licence.

Stock footage or AI B-roll

The Pexels licence makes every photo and video “free to use”, ads included, and “Attribution is not required.”

Two limits push ad makers to AI. Stock cannot show your product, and the same licence says “Don’t imply endorsement of your product by people or brands on the imagery.” A stock clip of someone smiling at a bottle that is not yours does little for a product ad.

A sensible split: stock for scene setters, AI for every shot your product appears in. A product photo becomes a moving shot in Kling or MakeUGC: product photo to video.

Left out, and why

Captions is out on its ad terms. Its Prompt to Video builds a talking video with generated B-roll, and AI Edit adds B-roll to your own clip, a “Generate media” option that “uses more credits”. But the app’s terms grant no advertising licence in words; only the separate Captions on web terms do.

Higgsfield is out on cost. It sells Kling, Veo and Seedance clips from one credit balance. Users find Seedance and Kling clips cheaper on Dreamina or Kling directly (8 of 52 sources: YouTube, YouTube). Its Marketing Studio makes a whole ad from a product link or up to 5 images, handling “script, shots, camera, and edit” itself.

Against MakeUGC: Higgsfield vs MakeUGC.

Seedance runs inside MakeUGC and invideo, so it sits in those sections. Every video model in the database is on the AI video hub.

More pages for MakeUGC users, sorted by job, in the MakeUGC hub →