I don't remember well, but try using a space.
Or "T" (English).
In general, see the second page, starting with message 27: /topic/3747/
Anyway, all these things related to the video should be saved in an archive along with the map after closing the editor, and you can then view it using WinRAR as a text file.
P.S. Of course, the question arises whether it wouldn't be easier to do it the old-fashioned way than go through such trouble, but I'm just saying what I remember.
But I think I accidentally found it. Now the question is different =)
What to click where xD
The first couple of tests showed that the camera falls deep underground =)