Hi people, my idea is to build a similar website to that ones I mention in the title, for those who don't know how they work it's quite simple: Content providers sign up on the site to create their "store" on the system, then they can upload their videos so they can sell them on their store. Then, clients can navigate through the different stores and they can buy clips and pay them by credit card. My question, is there any CMS prepared for this kind of business? or I'll have to build the site from scratch? Thank you!