I really want to finish a new alpha/beta/test version instead of making videos but there's still some more things I have to do first. The main thing is the human movement, I feel that it's getting close to where I want it, without having to use too many cheats. In the video you can see the progression in reverse order, I started out with just the feet connected directly to the waist, and now the legs are simulated also. I still have to fix up some things with the leg angles and detecting where to place the feet and balancing.
I've also been working on some graphics, you can see the tree model so far in the background, and I've been working on adding some CSG functions so I can add things like cockpits and driver areas to the vehicle models.