Why hasn't streaming gone after YouTubers?

We all know there's no good direct competition for YouTube, but I'm wondering why no big streaming service like Netflix has...

a) Started to offer "shorts"

b) Offered a big exclusivity contract to a popular YouTuber

No doubt there would be some risk involved, but the paycheck would make it more than a worthwhile risk for the YouTuber, and streaming services make big bets every day. Am I off base in thinking this is destined to happen?