180º C convection 19 minutes.
The solution was to look VERY carefully at the video (many times over) as it shows several tricks when layering.
As I could not get hold of the flour used in France (T45) in Austria - I worked with the flour nearest to the French one I could find locally - that was Type W700 (12% protein content)
But there is more - the realt trick to get to the pinnacle of Croissant building is found in my posting at my
entry below this recipe