Dirty Yoga Website

I am creating an online yoga website - where subscribers can take classes I have created online. I need help with one thing in particular. I want to manage the sequence or queue of the videos based on each user and need someone to code this for me. I do not want there to be a library of classes to choose from - but rather I want the classes to be served to subscribers in sequential order: 1 - 100 with all subscribers starting at class one. So once they finish class number 5 - the next time they log on they will be served class number 6. My streaming partner VZAAR has let me know that this can be done within their video platform through the API.