I think this announcement is firmly stating that they don't have the volume of small customers for that to be economical. YouTube can spend tens of millions a y

I think this announcement is firmly stating that they don't have the volume of small customers for that to be economical. YouTube can spend tens of millions a year shaving every last byte off their egress because they have such enormous volume that is pays off in aggregate. Vimeo can't do that so they don't try.