I could try to find a video, maybe there is one out there. But I will say that the blog post was pretty decent. Are you familiar with workflows and scriptable tasks at all? Or is this your first time working with them? Are you familiar with javascript? That might help us determine how many details you need or other education that might be helpful.
- In your workflow, create a Input named "inputProperties" of type "Properties"
- In the Schema of your workflow, drag a scriptable task item between the start/end items
- On the General tab of the scriptable task, find the "Inputs" section and add inputProperties there.
- On the Script tab, try the simple script I included below - replace myProp with a custom property in your cloud template
Also note that if you look at a particular run of your workflow (On your workflow, Choose All Runs, Click on a run), there is a Variables section. If you click on that section you should be able to find the inputProperties variable and expand/explore it. And essentially whatever is in there, is what you'll have access to in your script when you add inputProperties as an Input. So maybe review some of your failed runs just to see what you have available there.
Again, if your new to all of this, you may need some initial education on how to use workflows
var vmName = inputProperties.resourceNames[0];
var customProperties = inputProperties.customProperties;
var myProp = customProperties.myProp;
System.log("VM Name: " + vmName);
System.log("My Prop: " + myProp);
