I'd just like to note that you should indeed use the specific prompt in the description, or in my other reply here, to get a proper response from the LM. The prompt is designed to have the LM answer based only on the transcript and with a hard focus on the title, that made you click the video in the first place. That way your curiosity is sated and you can move on without having to deal with 10 minutes of bloat.

It takes the power of an LM being able to process language and the information assembled by a human. That way the LM cant drift into ambiguity or guessing.