Where do you go for official sources when the entire modern media establishment has an undeniable (and rather open) liberal bias?
Ignoring bias, do you believe that every given situation that some group may identify as a problem is guaranteed to have a reputable source reporting on it?
I'd love to find a more reputable source, but one is not currently available, and I'm not in a position to create one. That does not imply that the problem being reported on is illegitimate. You should be able to assess the contents of the video with PV's bias in mind - and most of the content really does stand on its own, especially in the context of relevant quotes from employees in OPs article.
There was also a massive trove[1] of internal Google documents dumped on PV related to, among other things, AI development and arguably politically motivated guidance by internal definitions of "fairness", designed to shape search results. Should these documents also be ignored because they're only being hosted by Project Veritas? You can see them yourself...
Ironically, this is the danger of trusting only select biased organizations with curating the flow of information - as you suggest, to most people, if a "reputable" source hasn't reported about it, it doesn't exist. How many years has 4chan been screaming about epstein, as another example, without major media investigation?
The bottom line is that no entity that acts as the front page to the internet should be curating information flow without a massive, blinking disclaimer.
1.https://www.projectveritas.com/google-document-dump/