Some of the tutorial videos include references to project files. Below are the downloads for those project files. Keep in mind that some of these files were created in older versions of Blender. Therefore, the functionality may not be the same in the current version of Blender.
Script to rotate camera around an object. See the Harlepengren Github repository.
For our Open Shading Language (OSL) scripts, check out the Harlepengren Github repository.