A lifetime of thinking that companies can reimplement cool tech they have in use somewhere else in a place that it would be even more useful has left me disappointed in the possibilities. I’m not familiar with Pixels because I don’t use them, but even if I took you at your word that it is automated captioning that works, I wouldn’t hold my breath that it will show up on YouTube just because Google has the tech on a Pixel.
It’s not like companies like Google have never had technical regressions either. Their core service, Google Search, is less useful to me than it was 10 years ago.