Ask HN: Super fast video hosting?

I want to send product demo videos to prospective customers. I want the video links to load almost instantaneously so that they don't browse away for slow video loading times. Since keeping their attention is a delicate matter, I believe even a 1 second delay would be important.

Do you know any fast, possibly uncrowded video hosting sites to provide such a service? I have vimeo and youtube in mind, but are they good enough? (last time I checked vimeo would take some seconds to load)