For someone looking to start without a huge investment of time and money, many
people set up a clip store at clips4sale.com for example. You can then see how people like your content, make some sales and go take it to the next level with a paysite perhaps using a company like CC Bill. Also you could start with some major Sponsors, many of which post here, doing affiliate marketing, sign up to some programs, buy a domain and start promoting. It will take alot of work to get sales going some sales in but when you do, it will keep you motivated to make more.
Good luck!