ViralMint generates b-roll automatically — keyword-matched Pexels stock blended with AI-generated b-roll images via Nano Banana. No watermark, no monthly cap.
ViralMint's Smart Video pipeline keyword-matches Pexels stock footage to your script automatically, then fills gaps with AI-generated b-roll images via Nano Banana (Google Gemini 2.5 Flash Image). The visual style preset (Documentary / Cinematic / Vlog / Card / Educational) tunes the stock-vs-AI ratio per scene.
Pexels stock is free at the per-clip level. AI-generated b-roll images run $0.06 per image via Nano Banana through ViralMint's cloud proxy. A 60-second video typically uses ~6–8 b-roll clips, mixing 4–5 free stock with 2–3 AI-generated for variety. Total AI b-roll cost per video: ~$0.12–$0.18.
Free stock-video tools like Pexels' own player don't let you batch-download keyword-matched clips into a pipeline. AI image services like Midjourney don't let you keyword-match to a script. ViralMint stitches both together into the Smart Video output with no watermark, no monthly cap, no subscription.
Open the desktop app's Smart Video page, paste a topic or your own script. ViralMint generates the script (if needed) and chunks it into scenes.
Documentary / Cinematic / Vlog / Card / Educational — each preset tunes the stock-vs-AI b-roll ratio. Cinematic leans heavy on AI-generated dramatic imagery; Documentary leans on Pexels footage.
For each scene, ViralMint keyword-searches Pexels for matching stock footage, then fills the rest with AI-generated b-roll images via Nano Banana. The visual layer composites with Ken Burns motion + your voiceover + word-by-word captions.
Output mp4 lands in the Videos page with all b-roll baked in. Cost per 60-second video: roughly $0.15–$0.30 total (AI b-roll is ~$0.12–$0.18 of that).
Last updated September 2026
| Capability | Pexels (DIY) | Midjourney | Storyblocks | ViralMint |
|---|---|---|---|---|
| Pricing | Free (manual download) | $10–$60/mo | $15–$99/mo | Free stock + $0.06/AI image |
| Keyword-matched to script | No (manual search) | No | No (manual) | Yes (automatic) |
| AI-generated b-roll | No | Yes (images) | No | Yes (Nano Banana) |
| Composed into video pipeline | No (clips only) | No (images only) | No (clips only) | Yes (full Smart Video) |
| Watermark | No | No | No | No |
highlighted column = clearer fit for that capability. Tied capabilities are left unmarked.
The Pexels stock layer is free at the per-clip level. AI-generated b-roll images via Nano Banana cost $0.06 per image through ViralMint's cloud proxy. A typical 60-second Smart Video uses ~6–8 b-roll clips with a 60/40 stock/AI mix, so total AI b-roll cost is ~$0.12–$0.18 per video. The desktop app itself, the keyword-matching, and the compositing are all free.
Not as a standalone tool today — the b-roll generation is part of the Smart Video flow. You can however generate AI images directly via the AI Image Generator tool ($0.06 per image), or download Pexels clips via the desktop app's import flow and use them as standalone assets.
Different trade-off. Nano Banana generates a static image per scene which ViralMint then pans/zooms (Ken Burns) for motion. Frame-by-frame AI video models (Sora, Veo, Pika) generate native motion but cost $0.50–$3 per 5-second clip vs $0.06 per Nano Banana image. For faceless TikTok / Shorts at scale, stock + Ken Burns is the right cost-quality balance; for hero brand-marketing pieces, frame-by-frame AI video wins.
The AI B-Roll Generator ships inside the free ViralMint desktop app — no subscription, no watermark, no per-minute cap. Download once, use on as many videos as you want.
