Fact check something in a 1-hour video without watching the whole thing

Summary

Someone posted a divisive claim about a famous person (Sam Altman, CEO at OpenAI) and I wanted to know if it was true (=> worth reposting/sharing) or false (=> bot-authored trash)

Background:

• Someone posted the claim that Sam Altman (at OpenAI, creators of ChatGPT) had sheepishly admitted that the advice he spent the last decade or so giving to CEOs he invested in … was wrong and that he himself had ignored all of it and done the opposite.
• The details of the claim fit with reality (I’ve spent about half my career in startups; OpenAI was not funded, founded, managed, or architected like a typical startup)
• The original poster did not include any attribution in their post, but in the comments they added a link to a YouTube video which they alleged included the claims; the fact they failed to attribute in the first place greatly increased the chances they were (at best) misinterpreting, or (at worst) making it all up
• Reading a 1 hour transcript is something I can do in 10 minutes or so, but it’s still time-consuming.
• Plain “search” (Ctrl-F in Chrome) wouldn’t work because they never quoted Sam Altman directly, they’d rewritten things in their own words. ARGH!

Approach

Here’s the LinkedIn post original: https://www.linkedin.com/feed/update/urn:li:activity:7206986218545233920/

Here’s the YouTube video that OP claimed to take her claims from: https://www.youtube.com/live/Pig9WbMN1lQ

Fortunately … that YouTube video has already been transcribed (I guess by Google?):

My default learned (human) solution:

1. Skimread that transcript, keeping my eyes peeled for mentions of “Y-C”, or “Y-Combinator” (or any common (mis)spelling thereof), and for “regret” and “mistake”, and “advice I’ve given”, and “past”, and “shame”
2. Speed-up / slow-down the skimreading from moment to moment based on how much I’m zoning-out on the boredom and mental effort of trying to read 1 hour of text at high speed

My AI-centric (ChatGPT) solution:

1. Ctrl-N opened a new browser
2. typed “chat” which autocompletes to “https://chat.openai.com/” for me since I use it often 😉
3. Used the prompt below, and copy/pasted the entire transcript in, to get this answered for me
4. NB: in the prompt I deliberately tasked it with identifying WHERE in the transcript this happened — that way I could (finally!) Ctrl-F into the transcript and verify for myself both: a) was this actually said? and b) what was the context immediately preceding/following — was it perhaps a joke? etc

Prompt used:

“In this conversation, is there a point where someone says that the way they launched OpenAI is different from the way YC advises people to launch companies? If so point to the quote where it is said:

[copy/paste of the transcript from Youtube page — this was many pages maybe 10s of screens long, lots of text]”

Response:

“Yes, there is a point where someone says that the way they launched OpenAI is different from the way YC (Y Combinator) advises people to launch companies. Here’s the quote:

“There were a lot of things that we really held dear as YC…[ChatGPT gave a whole paragraph answer that I was able to Ctrl-F the first sentence from and immediately verify it in the YouTube transcript]”

“