video tutorial platform

We are setting up an platform for senior citizens where they can learn to work with software. Kind of similar to [login to view URL], but simplified. Not as big as that and focussed on an different target. We want to work with drupal and only existing modules/plugins. To be able to make it faster and cheaper. No custimization What is important: - extended member management (different levels, able to see more video's , backend management) - really good search module (senior citizens are no experts, usability needs to be 100% perfect) - video module (good player, for flv files , look at [login to view URL] for examples) - affiliate module (comission for other people that make other users sign up) Please only bid when: - you can show your prior work and experience - you can show me which plugins you will use (with link/demo) - fair price You will not need to provide: - design - content Looking forward to an quick responds.