If you have ever come back to a YouTube Summary link for a video you already processed, you may have noticed a small thing: the next time you pasted the same link, we used to re-run the whole pipeline. We would fetch the captions, call the AI, format the result, and only then show it to you. For a video we had already summarized, that meant waiting several seconds for a page whose answer we already had.
As of today, that wait is gone. When you paste a link for a video we have already summarized, the page now shows up almost immediately. The progress bar, the spinner, the loading screen — all skipped. You go from "pasted a link" to "reading the summary" without a stop in between.
What changed, in plain terms
Before, every Summarize button click started a new job from scratch, even if the result was already in our database. Now, the first thing the page checks is "do we already have a summary for this video?" If the answer is yes, we just show it.
If we do not have it yet — or if you specifically asked for a fresh run — the page behaves exactly like before, with the progress bar and the live status.
The check happens server-side, so you do not need to do anything special. The benefit shows up automatically the second time you use a video.
When you would notice
- You summarize a video, get the summary, share the link with a friend or come back to it later, and the next time you paste the link, the page is just there.
- You accidentally re-paste the same URL after closing the tab.
- You have a small set of "staple" videos you summarize more than once — for example, a lecture that you reference often, or a talk you want to keep on hand.
For all of these, the new behavior is "the page is just there."
When you would not notice
- The first time you summarize a video, we have to do the work. That has not changed.
- If a video's captions are updated upstream (rare but possible) or you simply want a fresh take from a newer model, you can still force a re-run. The option is exposed in the API today, and a UI control for it is coming.
What this is not
This is not so much a new feature as a quiet fix. We did not change how summaries are made, what they look like, or what they cost. We just stopped repeating work we had already done.
If you have a favorite summary you want to keep around, the summary page itself is bookmarkable. If you want to come back to it later, that link will keep working.
