Video clip on the map (adventure dialog).

A user had a question related to this topic. For this reason, I will explain what I know (in more detail).
First, you need to create a new dialog in the MapPropretiesTree:

Then, expand the "dialog" tab, the newly appeared "sentences" tab, and add new lines.

Click the "New" button next to the "text" line, and a window will appear where you need to enter a name.