can you try pressing the new scene button, and see if you can move around?
From the video, the tech demo had not completed loading and required a little bit more time to load everything in, as that demo starts above the terrain.
Adding the orbit camera may have the fixed camera property, in which case would stop you from moving around, and look like its broken.
Steps to check if working.
> create new scene, RMB to looka around and LMB to click on objects. then add in a preset from the bottom left panel, e.g. utility scale
> restart skyline, then load a tech demo and give a little bit of time, as island roads is one of the bigger demos to load, especially for older machines.
Note: usually, when you see the camera under the terrain, then the scene is still loading and requires a little bit more time.
Hope this helps

if not, then we will try something else
