Uwe, if you look closely at 2:16-2:20 for the first brief glimpse and then again at 3:35-3:38 for the second VERY brief glimpse, you'll see there is a magnification in between the two paper guides where the type slugs touch the paper.
If you watch the video 1000 times as I have you'll see this thing is attached to the type basket paper guides.
It really just flashes on the screen and unless you can advance frame by frame it will be difficult to spot but, it's there.
As to the actual make of the typewriter, meah, it just 'feels' like an Olympia SM9