you want to upload to the Share site.
share.myfreecams.com.
To login you must first be logged into the main myfreecams site.
Once logged in, at the simplest you create an Album upload 1 or more videos to an album. If you want to sell the videos individually then do one per album. In the album settings you can add a token amount for easy sales. You can also create a password, set VIP Membership, create clubs, collections and even create "Vouchers". So there are many ways to sell the videos. It's very flexible depending on what you would like to do.
Note that Region blocking in the share site is independent of the main MFC site. So if you block any regions there you must redo it in the share site.
That should get you going.