I think youtube's hegemony is past; it WAS the main point to upload your videos at some point because storage and bandwidth was expensive, and on-demand video conversion difficult and resource-intensive. But nowadays anyone can host videos on a $5/month shared server, with software to handle things like video conversion.
Youtube pivoted from "just" hosting videos to a community though, to the point where you won't get any views unless you are on youtube and play by their rules and network effects.