The BEST local AI video generator is here! Minimax H3 tutorial
Local deployment of MiniMax H3 via ComfyUI provides filmmakers with cost-free AI video generation featuring native audio, prompt accuracy, and robust character consistency.
What this lesson covers
This video details the features and local ComfyUI installation process for MiniMax H3, an open-source multimodal AI video generator. It demonstrates text-to-video, image-to-video, video-to-video motion transfer, and native audio generation capabilities.
Key takeaways from the creator
AI-extracted notes, not independently verified product claims. Timestamp links let you check each point in the original video.
- 00:00 ↗
MiniMax H3 runs locally on consumer hardware with as little as 5 to 6 GB of VRAM while supporting native audio generation and precise instruction following
- 01:24 ↗
MiniMax H3 accepts multimodal inputs including text, static reference images, video clips, and audio tracks to steer output consistency and style
- 02:46 ↗
The model can copy character movements from a source reference video and re-render them onto an entirely new character defined by an input image
- 05:05 ↗
MiniMax H3 uses two separate diffusion model types: FL2VA for text/image-to-video tasks and Ref2VA for reference-to-video motion transfer
- 05:26 ↗
Compressed model weights (such as FP8 and INT8 quantizations) enable high-quality local generations on lower VRAM GPUs
Workflow outlined in the video
- Update ComfyUI to the latest release using update_comfyui.bat prior to launching MiniMax H3 workflows
- Select and load a MiniMax template directly from ComfyUI's templates panel
- Download the preferred diffusion model checkpoint (such as MiniMax FP8 FL2VA) into ComfyUI's models/diffusion_models directory
- Download the Qwen-3-VL-32B text encoder into models/text_encoders and place the video/audio VAE files into models/vae
- Refresh ComfyUI, link the models in the workflow nodes, and adjust resolution and aspect ratio parameters before rendering
Before you use this workflow
These notes describe the source video at its publication date. Model access, pricing, connectors and interfaces may have changed. Check the original source and the provider’s current documentation before installing an add-on, connecting an account or spending credits.
ReelStack has not independently tested this workflow. Preview one representative shot and check motion, continuity and output quality before applying it to a full production. No result, cost saving or model capability is guaranteed.
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How to interpret the numbers
307,229 views captured 27 September 2026. ReelStack recommendation score: 62/100. Formula: radar-v5. This is ReelStack’s calculation, not a YouTube rating or a measure of factual accuracy.
Show the calculation
- 45% performance: 2.30× views vs 8 other channel videos observed at a similar age. View-evidence factor 100% (views / (views + 1,000))
- 25% freshness: 7/100 with a 14-day half-life
- 20% momentum: 1787 views/day vs 58 channel baseline (7 comparable uploads), with the same view-evidence factor
- 10% engagement: 92/100; likes + 4× comments, smoothed with a 500-view neutral prior