Ino Preview Video

When you generate video in ComfyUI - LTX-Video, Wan, whatever - the raw result is a VIDEO tensor, not a file you can double-click. Ino Preview Video is the terminal node that saves it to the temp directory and pops an in-node preview so you actually see what came out without spelunking through output/. It's the video-era equivalent of the built-in image preview, and if you've run a video workflow and stared at an empty canvas wondering where the result went, you know why this node exists.

The name is doing real work: it's a preview, not an archive. It writes to ComfyUI's temp folder, which gets cleaned up - so use this node to eyeball results during iteration, and use a proper Save Video node for anything you want to keep. Getting that distinction right is the difference between "my workflow ate the file" and "oh right, it was a preview."

How it works

It's a thin wrapper around ComfyUI's native video handling. The VIDEO input arrives, the node computes an output filename with a random suffix (so successive runs don't clobber each other), and saves it to the temp directory using the format and codec you pick - defaulting to mp4 / h264, which browsers play without fuss. Then it returns a preview widget for the UI. It's an output node with no data outputs; its job is done the moment you can see the video.

The format combo (mp4, webm, auto) and codec combo (h264, auto) mirror ComfyUI's native video save options. h264/mp4 is the safest combination for in-browser playback; webm/VP9-style can be higher quality per byte but less universally playable.

Inputs and outputs

• video (VIDEO) - from your video sampler/model chain.
• format - mp4, webm, or auto.
• codec - h264 or auto.
• enabled - off skips the save entirely.

No outputs - it's a terminal preview node.

Installing it

Part of ComfyUI-InoNodes (Inoland). ComfyUI Manager → search "ComfyUI Ino Nodes" → install → restart. Manual:

cd ComfyUI/custom_nodes
git clone https://github.com/nobandegani/comfyui_ino_nodes
cd comfyui_ino_nodes
pip install -r requirements.txt

Restart after. This one leans on the VIDEO type and native video codecs, which are recent ComfyUI additions - the README's v0.18.1+ floor is a real requirement here, not boilerplate. Requires inopyutils (auto-installed).

Common issues

Most problems are expectations, not bugs. If the preview won't render in your browser, switch to h264/mp4 - that's the compatibility default and almost always resolves it. If you can't find the file later, remember it's in temp, by design, for preview. And if the node errors on the VIDEO input, your ComfyUI is too old to have the native VIDEO type at all - update before anything else. For keeping results, chain a Save Video node after your generation and treat this node as the fast feedback loop during tuning.