Wow, that video certainly brought up a lot of good memories, because I was there at Berget 6, along with a few Polish guys
If anyone has the chance to go to that event someday somehow, I strongly suggest doing so.
Anyway, as somebody has pointed out above, Berget is Swedish (Sweden), not Swiss (Switzerland).
I'm sure you can find lots of Airsoft teams and games in Switzerland, if you know the language. I'm not that much familiar with Airsoft around those parts so I can't help you out with useful links.