The type shown in the video is pretty common in Germany and besides its ability to make a room pitch black it also provides a decent protection against burglary.
Many, if not most of these shutters are certified for resistance class RC2 according to DIN EN 1627.
The title of the video is wrong, by the way.
It is not Rouladen, which would be a dish of filled rolled meat, but Rollladen. Rollladen is literally rolling shutter and it is really written with three l in a row.
In Italy they're "tapparelle", and I think they're a fantastic thing to have for your house. With even mediocre ones you can get a room really dark even if it's pretty light outside.