What are the alumni using for their server? If they have a stable server then we needn't worry ourselves about preserving the information (David posted here on my recommendation, though, because I didn't realize that the alumni were now running the site).
It would be a pity to see this stuff lost, that's the key issue. Serving the long video content and the like would be expensive if the site became popular but it would be nice to know it's going to survive.