Are there any updates to this? I also need to implement a SCNCameraController as I need movements using slightly different key combinations (translation using mouse drag, zoom for scroll wheel, rotations using CMD scroll wheel). The WWDC mentions this, but there isn’t sufficient documentation on how this is supposed to be implemented.

It’s just a mature product. I’m currently building a project with it. Nor are videos removed. It’s pretty cool, honestly. https://developer.apple.com/videos/play/wwdc2017/604/