Thinking twice, the problem is that a new user would not be able to reproduce what you are doing in the video because you haven't shown how to create a Staff + TabStaff.
Which leads to my question: is there a "GUI way" to set a StaffGroup composed of Staff + TabStaff?
I could do it only by tweaking the lilypond input.
I find the Denemo's Score layout not easy to use. AFAICS just few variables can be edited in the GUI.
Frescobaldi's Score Wizard is much easier.
Am I missing something? Maybe a screencast/tutorial on this topic would help.
Many thanks
Federico