Extract the essence

There is great content on YouTube — deep insights, actionable knowledge — but it's often trapped in hours-long videos. Seimai distills it into core ideas, accessible in minutes. Remove the time barrier and unlock more in a fraction of the time.

Seimai feed showing video summaries
Coming soon on iOS
Coming soon on Android

Get the ideas without the three-hour commitment.

Video with watch time and read time badges

Committing 3:03:33 to watch a video is a big ask. Get the essence in just 9:12 read time — the key arguments, stories, and takeaways. Decide whether to watch with full context or simply take the ideas and move on.

Structured to scan, detailed enough to learn.

Summary overview with sections Expanded summary section detail

Every summary is organized into sections you can scan at a glance. Read just the headlines to get the picture, expand a section when something catches your interest, or dive into the full detail. You choose how deep to go.

Subscribe once. Every new video, summarized.

Add your favourite YouTube channels and Seimai does the rest. Every time a new video is published, it gets summarized to your preferences and delivered to your feed.

No need to check back, no need to decide what to watch. The ideas come to you.

Subscribed channels list

Follow every source. Miss less content. Skip the overlap.

Multiple channels cover the same stories with overlapping takes. Instead of watching each one, get the core ideas from all of them — and quickly spot where sources diverge or add something unique.

News and finance video summaries

Go deeper when something sparks.

A summary gives you the picture. But sometimes an idea catches your attention and you want more — context, nuance, the speaker's exact argument.

Ask the integrated AI agent anything about the video. It knows the full transcript and can search the web for additional context. The summary is the starting point, not the ceiling.

AI chat about a video

University-level ideas. Coffee-break reading time.

Lecture video summaries
精米

Why Seimai

Seimai (精米) is the Japanese art of rice polishing — carefully removing outer layers to reveal the essence within. We do the same with video content: distill the hours into pure ideas.