From that viddie I would have gone a little less water maybe? I haven't tried this ...might have a go at it with a Caties Bubbles LTV tomorrow and see how it flies.
If in doubt, just double the soap quantity. No soap is wasted more than an unused soap.
Marco method works and rocks.
this method is awesome, I use it all the time, even with hard soaps like MWF or Valobra.
Before giving up on a soap, everyone should give it a try