If you want.. you can
Put your guest limit at 0 so people will be redirected to the login page so a account is required.
On sign up you can set the only membership option as paid and use the integrated paypal module that is stock with the script.

If you want to have guest be able to view videos but not upload unless they pay you will have to do some code writing ...
Im sure bplex or someone could write this mod for you at a fair price.