Hello, I'm one of the devs from the Soul Reaver decomp project (Federico).
We have seen your video and after some work on that front today, the Linux build is up and running again. I wanted to let you know that we really appreciate you guys giving us some more exposure, it keeps us motivated to continue doing work in the project. I also wanted to mention that there is currently an HD texture pack for the game out there (only for the Dreamcast version though) which is pretty good.
We aren't many working on this but we're around 60% completion and parallel to the reverse-engineering of the game code, there's a dev working on a texture editing tool for the game that's almost complete.