Erik Kostson
Ansys Employee
Hi
We are not allowed to open files.
See this note below for the issue here. You need to use the highlighted settings below - so the czm material used in your case and as shown in your screenshot above is not accepted by Mechanical. We need to choose as mentioned/shown below (screenshot from the help manual for latest version) either Separation-Distance based Debonding or Fracture-Energies based debonding.

As for the videos, they are using a previous release when this might have worked - as per manual above though this (Exponential for interface delamination) is not supported anymore.