@stefano,

re:
> I’m wondering if one could bypass the dialogue box
> with a script/ shortcut that has the same pdf export settings shown in the video…

Yes you can pass in some options to use specific settings and not show the dialog, check out here look under "Scriptable options for PDF/AI export."

http://moi3d.com/forum/index.php?webtag=MOI&msg=6579.1

- Michael

EDIT: fixed wrong link