It's hard to keep staff once a project is "done". Even if they wanted to stay, departments have budgets and its hard to justify a salary for someone to maintain

It's hard to keep staff once a project is "done". Even if they wanted to stay, departments have budgets and its hard to justify a salary for someone to maintain free access to lectures. Based in the general lack of uniformity on university websites, I wouldn't be shocked if at least some of the people cobbling them together were students working part time who eventually just move on to the next stage of their careers.