Welp. That was a mess. Audio/video sync issues, forgetting to output at 4k and instead doing SD (!), but a quick one as I get back into it now summer has well.. desummered.
0:00 - frameranges (don't start at 1)
2:20 - introducing... the root node!
4:30 - exploring knobDefaults - transforms...
9:00 - exploring knobDefaults - ...and the root