I set up a Wordpress site to promote the video content. Then, I use http://www.webmarketingmagic.com (WMM) to process the order using the Paypal.com gateway. Once Paypal recognizes the payment, they send the info to WMM and an email is automatically sent to the customer with instructions on how to access the video content.
Check out http://www.thesixfigurevideographer.com/stateofourindustry/ for an example.)
In most cases, it's a link to a website where they can view or download the content within 24 hours. After the 24 hour period, they have to contact me again to request download information which keeps them from sharing the link to everyone they know.
There are ways to make the system a lot more secure but I've found the more you try to protect it, the more it costs to have the proper software solution in place.
Another option I plan on trying soon is to create a WP membership site and simply sell short term memberships to access video content. You pay for the 2 day membership or whatever, and once it's done, your membership expires along with your password. Some of my clients have expressed an interest in putting together a similar model so I'll probably know more about how this works in a few months.
Kris
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Kris Simmons
Founder - http://www.MindYourVideoBusiness.com
Owner - http://www.6strongmedia.com