It doesn't have to be for your use-case. e.g. KDE has their own instance, as does Blender. It would perhaps be a good fit for MIT to host their OCW videos, or for Khan Academy to host their material, or people sharing conference talks, or governments, or quick home DIY videos, or vlogs and idle musings, or hobbyists showing/discussing their thing they like, etc. Videos that are meant to help people to better themselves or collaborate fit better on a platform that doesn't try to be a constant sales funnel.