To me it looks like everyone is freeloading off unlisted youtube videos. Can't beat free ;) Apart from that, ffmpeg can generate all the files you need and ngi

To me it looks like everyone is freeloading off unlisted youtube videos. Can't beat free ;) Apart from that, ffmpeg can generate all the files you need and nginx can host them, but make sure you have a hosting company with generous traffic allowance. Putting this on S3 is probably a lot more expensive than renting vimeo, which is a dedicated white label video hosting service.