How to make a non-iTunes self-contained downloadable video podcast?

I have a series of videos from a conference I taped years ago that I want to make availanble to people as a digital download. I have purchased some training coruses from places like Ripple that send you an e-mail with a link to the download the course material. Clicking on it opens up iTiunes and downloads the entire training course as a Podcast (video). So it is not hosted on iTunes and is self-contianed to download all "eppisodes."

How is this done? How is this created so I can post it on a server and have people download it? Auto-instal to iTunes would be nice if easily acheivable.

Thanks.