A research tool built on a language model has one obvious failure mode. It can write a fluent, confident, well-structured paragraph that is also wrong. The grammar gives no warning. The tone is identical whether the sentence is solid or invented.
So we made a rule early and built the whole pipeline around it. Every point in a TubeRefinery report has to land on the exact second in a real video where someone said it. If a sentence cannot be traced to a timestamp, it does not go in the report.
That rule does more work than it looks like.
The first thing it does is make the report checkable. When a line surprises you, you do not have to trust us and you do not have to rewatch an hour of footage to find the moment. You click, the source video opens at the right second, and you decide for yourself whether the restatement is fair. The burden of proof sits where it belongs, on us, every single time.
The second thing is quieter and matters more. Forcing a citation changes what the model is allowed to produce. A system that can write whatever sounds right will, now and then, write something that sounds right and isn't. A system that has to attach a timestamp to each point has to find the moment first. When there is no such moment, nothing goes in. The requirement acts like a leash on the confident-but-fictional sentence, because that sentence has nowhere real to anchor.
None of this makes the report infallible. A speaker can be wrong, and if they are, the report will faithfully carry their error, cited to the second. What the citation guarantees is narrower and, we think, more useful: that the report reflects what the videos actually say. The difference between "an AI told me" and "this person said this at this timestamp, go see" is the difference between a rumor and a source.
There is a cost. Pinning every point to a moment is slower and more expensive than letting a model freewrite a tidy summary. We pay it on purpose. A summary you cannot verify saves you an afternoon and buys you a document you can never fully trust, which means at some point you have to go watch the videos anyway. That defeats the entire point.
So the report is longer than a summary, more skeptical than a highlight reel, and honest about where it is thin. Every line earns its place by showing where it came from. That is the whole design, and we would rather ship nothing than break it.