Enterprise Video is a huge content niche. I've used YouTube in the past for business videos, but it was awkward. I wanted greater privacy, which YouTube does not really offer, because these videos discussed pre-launch ideas. We already used Office 365, so Microsoft Stream would have been a no-brainer.
I would love to perform research with the MS Stream platform, too. By focusing on the niche of business, Stream is creating interesting audience dynamics that will be quite different from the "grazing" model of recreational video watching. This is relevant to my interests.