Hi Dan - I suppose that the question at hand is what is missing in Andrew’s tutorial video? That clearly mentions all the required components that one should use in any Human UI definition.
Apart from that, there’s an important rule: Don’t hook the output of a value listener into the input of a “Create” component:
If you are getting stuck with something specific, please post the *.gh file and I’m sure that people will be able to help.
-wim