Video clip on the map (adventure dialog).

In the map tree (settings on the left),
what needs to be filled in?

In the map properties tree, yes. Fill it in as described in the instructions in the first post. Or is something not working?

1. I created a new directory, which, by the way,
is deleted when the computer is restarted.

That shouldn't happen...
Can you attach screenshots? How are you creating the directory (although I would call it a tree string or something like that, but never mind), and how is it then deleted?