I mean, given what Blender is, having tutorial videos accessible by anything other than desktop browsing isn't a hopeless or horrible thing. Every Blender user has a desktop or laptop (or has modded something to heck and back in order to run Blender), so having it be somewhat difficult to access a majority of their videos by mobile, TV, console, etc, might not be such a big loss.
Also, because Google pays you to host your videos, if you are willing to allow advertising.