I think that would imply that OpenAI is selling information to Google for advertising and in return get kickbacks. While that's conceivable, we also know that OpenAI has declared their intent to do ads themselves and so are going to be competing with Google and Meta and others.

I think what's more likely is that the question you asked is in the ether and it has expressed itself in your mind and elsewhere and so you are being exposed to such ads. Amplifying further could be that since it is on your mind, you have also touched on other closely related searches or sites that DO participate in AdWords, hence you seeing them on YT.