How to Use Hunyuan Video: Complete Setup Guide for ComfyUI

Hunyuan Video represents a breakthrough in open-source AI video generation, delivering photorealistic results — without subscription fees. After extensive testing, it stands out as the best free option for generating natural-looking subjects with realistic motion.

This guide walks you through how to get Hunyuan running locally using ComfyUI.

Installation Requirements

Before you begin:

✅ Install or update ComfyUI.

• Use the manager → click "Update All"
• Restart ComfyUI to apply updates

💻 Check your GPU VRAM:

• 12GB+ VRAM: use bf16 version
• Lower VRAM: use fp8 or fast video versions

📥 Downloading Hunyuan Models

From the official Hunyuan page, download:

1. 3 video model files → place in models/diffusion
2. Both VAE models → place in models/vae
   • bf16 = best quality + efficient
3. Fast Video LoRA → for low-VRAM optimization → models/loras
4. Text Encoders (at least clip and fp8) → models/text_encoders

These components work together to interpret prompts and generate motion.

⚙️ SETTING UP THE BASIC WORKFLOW

1. Visit the official Hunyuan workflow page
2. Right-click → “Save Link As” on the basic workflow JSON
3. Drag & drop the file into ComfyUI
4. Go to Edit Menu → Refresh Node Definition

This loads the entire generation pipeline in one step and prevents compatibility issues.

🔧 CONFIGURE KEY SETTINGS

• Diffusion Model: Use bf16 (if your GPU allows)
• Dual Clip Loader: Set to fp8
• VAE Loader: Set to bf16
• Flux Guide:
  • 6 = more creative
  • 10 = stricter prompt control
• Resolution: Start with 848x480 (good for testing)
• Frames: 73 frames ≈ 3 seconds
• Steps: Use 20–30 for standard quality

✏️ WRITING EFFECTIVE PROMPTS

Keep prompts:

• ✅ Simple and clear
• 📝 Descriptive, but not overly complex

Example:

“A young woman walking down a busy Tokyo street”
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This produces compelling, detailed video with natural movement.

🎞️ VIDEO OUTPUT FORMATS

• Default: animated WebP
• Want MP4?
  • Install Video Helper Suite via Custom Nodes
  • Add video combine node
  • Set frame rate to 24, choose format & quality

☁️ CLOUD-BASED OPTIONS

For users with low VRAM, cloud platforms offer:

• Access to 48GB+ VRAM
• Full Hunyuan workflow compatibility
• Speed + scalability without hardware investment

🧪 OPTIMIZE FOR LOW VRAM SYSTEMS

If you have under 16GB VRAM:

• Add Fast Video LoRA to your workflow
• Reduce step values
• Use fp8 model if needed
• Test combinations to find the best quality/performance tradeoff

CONCLUSION

‍Hunyuan Video proves that open-source tools can deliver high-quality video generation. While it may not yet match premium tools, it gives creators and developers a powerful way to explore AI fundamentals in filmmaking — all for free.

👨💻 Level up your AI filmmaking workflow — collaborate with Promptus.

🎬 Be the creator you’ve always wanted to be.