Hi @jdbaker500 this forum isn’t super active so you have to be a little patient sometimes to get a response. If you check the first post you’ll find an updated versions of the AR Sandbox suite. The site you linked to didn’t work for as it looks like a private subnet at UC Davis.
I think this is the public facing version of the same thing: https://web.cs.ucdavis.edu/~okreylos/ResDev/SARndbox/
That site still has the older installation instructions but a lot of it still relevant and worth a read through to get the most out of the software.
The videos are not totally obsolete but there have been some changes with the updates so that may be why the descriptions say that.
This forum isn’t super active but if you’re patient there’s a few enthusiasts of us who check in once in awhile including the author of the software to answer questions and provide some support.