Video clip on the map (adventure dialog).

So.
In the map properties tree, in dialogs, we add a new element. We open it. We add lines in Sentences; there, we also need to specify the speaker's text and the time. To set the camera, we choose a good, convenient position and press "L". There, we write the dialog number and press Save.

Added 44 seconds ago
In the script:

StartAdvMapDialog(0)

Or another number, if there are more.

Added 51 seconds ago

And I already went there with sadness.

Added 2 minutes ago
Well... What should I do? I learned how to create videos, but I can't insert them. The script seems to be written correctly, the fields are filled in, there is a working video, but it's not in the game.

Does absolutely nothing happen?

Added 1 minute ago
Send the map in a private message; I'll take a look and maybe fix it.