Earlier quoted context omitted.
Estimates for YouTube are on the order if $15-25 billion in annual revenue and a ~50% profit margin. With very solid revenue growth. The data is clearly worth real money, but I doubt the data alone is worth 5+ Billion on it’s own. PS: People are watching on the order of 1 Billion hours per day of video so IMO those revenue numbers may be low as that’s 1$ of revenue per ~15 hours of video watched.
youtube's revenue remains undisclosed in google's financial statements (see https://www.nytimes.com/2019/07/24/technology/youtube-financ... ). The $15-25 billion is merely a guess. The fact that google chose not to reveal youtube's financials is stark evidence that it's financials aren't great (otherwise, disclosing it should lead to better stock prices for google!).
I suspect if anything they don’t want to break out the financials because it would invite more competition. That or YouTube is tied so closely to the rest of the company it’s hard to separate the numbers.