This article originally appeared in http://www.internetarchitect.org/why-youtube/
A client just asked me if it’s possible to keep their company videos within their own website, running it off their own web servers, instead of posting it on YouTube. He didn’t want to involve YouTube but was open to Vimeo.
I told him that anything is possible with enough resources, but I highly recommend we go with YouTube. Keep in mind that this is MY opinion, and I do my best to know as much as I can but I don’t know everything, so take it with a grain of salt. My reasons: