I am looking for a site that can host our video clips relating to training in the health care industry. I need secure and private (not social networking) settings that allow for password access on per visitor and not per "group" or clip requirements. We would have several groups and in each group there would be several clips. A visitor may need access to different groups but it would be controlled by us. We would also need the provision to remove access of a visitor. Our clips are usually 10 mins in duration and HD is not a requirement. For the last 2 years we have been using phanfare but next week they are downgrading their security protocols so we need to switch. Any ideas you guys can throw at me would be appreciated.
Chris

Edit: To clarify: Groups = folders.