Here is some information that you may find useful:
You will need a cam that can hook up to your computer through a video capture card
You will need software on your computer (available from MareStare or WeFoal) that will feed the video from the video capture card up to the internet (MareStare or WeFoal Server).
This is the basics - what you will need to get started. The folks at MareStare or WeFoal will help you get everything working properly - they are great!!!!
This is a tool that is invaluable during foaling season - I can't imagine not having something like this available. It is amazing how many people watch these mares - and many many times this has saved lives!!!! I highly recommend having your horses viewed over the internet - it is the best!!!!
I personally use MareStare - Heather and Rich are great folks to work with - and the service is wonderful. I believe Tom and Michele at WeFoal are great too.