This is one of the challenges these companies like Yahoo and MSN have. They are huge platforms, and their text content is picked up by a lot of sites, and gets seen by a lot of eyes. But in terms of being a video platform for conventional content like news documentaries, they have been a failure. Couric did one such documentary last year. It was very controversial, but most of the coverage I saw was negative about her and her producer, and didn't really promote Yahoo. Not sure if she'd have more success at Netflix or Hulu. Not sure if either are looking to distribute that kind of content.
I suspect the recent sale of Yahoo and this announcement might signal some kind of change with how the company defines itself moving forward. We shall see.
http://www.businessinsider.com/katie-couric-leaves-yahoo-oath-2017-7