They made it through WW2 with nary a scratch by having public nude trampolining exhibitions. The Germans just figured it was better to forget about the image and focus on the Jews.
Are you sure that's an AT4? AT4's are one-shot disposables. What they're using looks like the Carl Gustaf recoilless rifle the AT4 is based on. It's like a man-portable howitzer. Scandinavians are scary with those.
Also I'm pretty sure there was at least one woman in the video. Swedes are cool that way.